Form N-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q


QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number         811-09475         

        Nuveen Insured Dividend Advantage Municipal Fund         
(Exact name of registrant as specified in charter)

Nuveen Investments
        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)


Kevin J. McCarthy—Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)

Registrant's telephone number, including area code:         312-917-7700        

Date of fiscal year end:            10/31          

Date of reporting period:         7/31/07         

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments

    Portfolio of Investments (Unaudited)             
    Nuveen Insured Dividend Advantage Municipal Fund (NVG)             
    July 31, 2007             
Principal        Optional Call         
Amount (000)    Description (1)    Provisions (2)    Ratings (3)    Value 
    Alabama – 4.3% (2.8% of Total Investments)             
$          5,310    Athens, Alabama, Water and Sewerage Revenue Warrants, Series 2002, 5.300%, 5/01/32 –    5/12 at 101.00    AAA   $   5,585,324 
     MBIA Insured             
3,045    Hoover, Alabama, General Obligation Bonds, Series 2003, 5.000%, 3/01/20 – MBIA Insured    3/12 at 101.00    AAA    3,168,871 
10,000    Jefferson County, Alabama, Sewer Revenue Capital Improvement Warrants, Series 1999A, 5.375%,    2/09 at 101.00    AAA    10,331,700 
     2/01/36 (Pre-refunded 2/01/09) – FGIC Insured             
18,355    Total Alabama            19,085,895 
    Alaska – 3.6% (2.3% of Total Investments)             
15,000    Alaska, International Airport System Revenue Bonds, Series 2002B, 5.250%, 10/01/27    10/12 at 100.00    AAA    15,992,699 
     (Pre-refunded 10/01/12) – AMBAC Insured             
    Arizona – 2.3% (1.5% of Total Investments)             
5,000    Phoenix, Arizona, Civic Improvement Corporation, Senior Lien Airport Revenue Bonds, Series    7/12 at 100.00    Aaa    5,145,800 
     2002B, 5.250%, 7/01/32 – FGIC Insured (Alternative Minimum Tax)             
6,000    Phoenix, Arizona, Civic Improvement Revenue Bonds, Civic Plaza, Series 2005B, 0.000%,    No Opt. Call    AAA    5,135,580 
     7/01/37 – FGIC Insured             
11,000    Total Arizona            10,281,380 
    California – 14.4% (9.3% of Total Investments)             
2,000    Alameda Corridor Transportation Authority, California, Subordinate Lien Revenue Bonds, Series    No Opt. Call    AAA    1,101,760 
     2004A, 0.000%, 10/01/20 – AMBAC Insured             
    California Educational Facilities Authority, Revenue Bonds, Occidental College, Series 2005A:             
1,485     5.000%, 10/01/26 – MBIA Insured    10/15 at 100.00    Aaa    1,552,226 
1,565     5.000%, 10/01/27 – MBIA Insured    10/15 at 100.00    Aaa    1,634,752 
6,000    California Infrastructure Economic Development Bank, First Lien Revenue Bonds, San Francisco    No Opt. Call    AAA    6,545,340 
     Bay Area Toll Bridge, Series 2003A, 5.000%, 7/01/33 (Pre-refunded 1/01/28) – AMBAC             
     Insured (UB)             
    California, General Obligation Bonds, Series 2000:             
375     5.250%, 9/01/17 (Pre-refunded 9/01/10) – MBIA Insured    9/10 at 100.00    AAA    391,868 
190     5.250%, 9/01/17 (Pre-refunded 9/01/10) – MBIA Insured    9/10 at 100.00    AAA    198,546 
10,000    California, General Obligation Refunding Bonds, Series 2002, 5.000%, 2/01/23 – MBIA Insured    2/12 at 100.00    AAA    10,324,900 
8,890    California, General Obligation Veterans Welfare Bonds, Series 1997BH, 5.400%, 12/01/14    12/08 at 101.00    AA–    9,114,028 
     (Alternative Minimum Tax)             
3,000    California, General Obligation Veterans Welfare Bonds, Series 2001BZ, 5.375%, 12/01/24 –    12/07 at 101.00    AAA    3,004,350 
     MBIA Insured (Alternative Minimum Tax)             
2,425    Fullerton Public Financing Authority, California, Tax Allocation Revenue Bonds, Series 2005,    9/15 at 100.00    AAA    2,510,457 
     5.000%, 9/01/27 – AMBAC Insured             
365    Golden State Tobacco Securitization Corporation, California, Enhanced Tobacco Settlement    6/17 at 100.00    BBB    341,009 
     Asset-Backed Bonds, Series 2007A-1, 5.125%, 6/01/47             
1,990    Kern Community College District, California, General Obligation Bonds, Series 2006, 0.000%,    No Opt. Call    AAA    838,845 
     11/01/25 – FSA Insured             
625    Los Angeles Department of Water and Power, California, Waterworks Revenue Bonds, Series    7/16 at 100.00    AAA    650,750 
     2006A-1, 5.000%, 7/01/36 – AMBAC Insured             
7,935    Los Angeles, California, Certificates of Participation, Series 2002, 5.300%, 4/01/32 –    4/12 at 100.00    AAA    8,230,103 
     AMBAC Insured             
7,500    Northern California Power Agency, Revenue Refunding Bonds, Hydroelectric Project 1, Series    7/08 at 101.00    AAA    7,649,775 
     1998A, 5.200%, 7/01/32 – MBIA Insured             
2,320    Sacramento Municipal Utility District, California, Electric Revenue Bonds, Series 2001P,    8/11 at 100.00    AAA    2,428,460 
     5.250%, 8/15/18 – FSA Insured             
6,720    San Jose Redevelopment Agency, California, Tax Allocation Bonds, Merged Area Redevelopment    8/17 at 100.00    AAA    6,209,549 
     Project, Series 2006C, 4.250%, 8/01/30 – MBIA Insured (UB)             
1,690    Ventura County Community College District, California, General Obligation Bonds, Series 2005B,    8/15 at 100.00    AAA    1,759,493 
     5.000%, 8/01/28 – MBIA Insured             
65,075    Total California            64,486,211 
    Colorado – 5.8% (3.8% of Total Investments)             
17,300    Adams County, Colorado, FHA-Insured Mortgage Revenue Bonds, Platte Valley Medical Center,    8/15 at 100.00    AAA    17,987,674 
     Series 2005, 5.000%, 8/01/24 – MBIA Insured             
750    Arkansas River Power Authority, Colorado, Power Revenue Bonds, Series 2006, 5.250%, 10/01/32 –    10/16 at 100.00    AAA    793,845 
     XLCA Insured             
17,000    E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2000B, 0.000%,    No Opt. Call    AAA    7,273,960 
     9/01/25 – MBIA Insured             
35,050    Total Colorado            26,055,479 
    District of Columbia – 1.6% (1.1% of Total Investments)             
6,805    District of Columbia, Revenue Bonds, Georgetown University, Series 2007A, 4.500%, 4/01/42 –    4/17 at 100.00    AAA    6,496,802 
     AMBAC Insured             
935    Washington Convention Center Authority, District of Columbia, Senior Lien Dedicated Tax    10/16 at 100.00    Aaa    850,785 
     Revenue Bonds, Series 2007, Residuals 1606, 5.774%, 10/01/30 – AMBAC Insured (IF)             
7,740    Total District of Columbia            7,347,587 
    Florida – 11.8% (7.6% of Total Investments)             
    Florida Municipal Loan Council, Revenue Bonds, Series 2003B:             
2,305     5.250%, 12/01/17 – MBIA Insured    12/13 at 100.00    AAA    2,452,866 
1,480     5.250%, 12/01/18 – MBIA Insured    12/13 at 100.00    AAA    1,568,504 
11,600    Greater Orlando Aviation Authority, Florida, Airport Facilities Revenue Bonds, Series 2002B,    10/12 at 100.00    AAA    11,919,464 
     5.125%, 10/01/21 – FSA Insured (Alternative Minimum Tax)             
8,155    Lee County, Florida, Solid Waste System Revenue Refunding Bonds, Series 2001, 5.625%,    10/11 at 100.00    Aaa    8,632,801 
     10/01/13 – MBIA Insured (Alternative Minimum Tax)             
    Miami-Dade County, Florida, Aviation Revenue Bonds, Miami International Airport, Series 2002:             
7,165     5.625%, 10/01/15 – FGIC Insured (Alternative Minimum Tax)    10/12 at 100.00    AAA    7,669,344 
5,600     5.750%, 10/01/16 – FGIC Insured (Alternative Minimum Tax)    10/12 at 100.00    AAA    5,989,648 
10,000     5.125%, 10/01/21 – FGIC Insured (Alternative Minimum Tax)    10/12 at 100.00    AAA    10,275,400 
2,000     5.250%, 10/01/22 – FGIC Insured (Alternative Minimum Tax)    10/12 at 100.00    AAA    2,066,480 
1,000    South Miami Health Facilities Authority, Florida, Hospital Revenue, Baptist Health System    8/17 at 100.00    AA–    997,510 
     Obligation Group, Series 2007, 5.000%, 8/15/42             
1,000    Tallahassee, Florida, Energy System Revenue Bonds, Series 2005, 5.000%, 10/01/28 – MBIA Insured    10/15 at 100.00    AAA    1,036,220 
50,305    Total Florida            52,608,237 
    Georgia – 2.2% (1.4% of Total Investments)             
6,925    Atlanta and Fulton County Recreation Authority, Georgia, Guaranteed Revenue Bonds, Park    12/15 at 100.00    AAA    7,209,410 
     Improvement, Series 2005A, 5.000%, 12/01/30 – MBIA Insured             
1,000    Atlanta, Georgia, Water and Wastewater Revenue Bonds, Series 2004, 5.000%, 11/01/22 –    11/14 at 100.00    AAA    1,044,720 
     FSA Insured             
1,695    Georgia Housing and Finance Authority, Single Family Mortgage Bonds, Series 2002B-2, 5.500%,    12/11 at 100.00    AAA    1,728,527 
     6/01/32 (Alternative Minimum Tax)             
9,620    Total Georgia            9,982,657 
    Idaho – 1.0% (0.6% of Total Investments)             
    Idaho Housing and Finance Association, Grant and Revenue Anticipation Bonds, Federal Highway             
    Trust Funds, Series 2006:             
3,000     5.000%, 7/15/23 – MBIA Insured    7/16 at 100.00    Aaa    3,162,660 
1,130     5.000%, 7/15/24 – MBIA Insured    7/16 at 100.00    Aaa    1,189,540 
4,130    Total Idaho            4,352,200 
    Illinois – 13.0% (8.4% of Total Investments)             
10,000    Bolingbrook, Illinois, General Obligation Bonds, Series 2002A, 5.375%, 1/01/38 (Pre-refunded    1/12 at 100.00    AAA    10,624,100 
     1/01/12) – FGIC Insured             
1,305    Chicago, Illinois, General Obligation Bonds, Series 2001A, 5.500%, 1/01/38 – MBIA Insured    1/11 at 101.00    AAA    1,371,411 
    Chicago, Illinois, General Obligation Bonds, Series 2001A:             
50     5.500%, 1/01/38 (Pre-refunded 1/01/11) – MBIA Insured    1/11 at 101.00    AAA    53,146 
3,645     5.500%, 1/01/38 (Pre-refunded 1/01/11) – MBIA Insured    1/11 at 101.00    AAA    3,874,307 
    Chicago, Illinois, Second Lien Passenger Facility Charge Revenue Bonds, O’Hare International             
    Airport, Series 2001C:             
4,250     5.500%, 1/01/16 – AMBAC Insured (Alternative Minimum Tax)    1/11 at 101.00    AAA    4,450,473 
4,485     5.500%, 1/01/17 – AMBAC Insured (Alternative Minimum Tax)    1/11 at 101.00    AAA    4,689,292 
4,730     5.500%, 1/01/18 – AMBAC Insured (Alternative Minimum Tax)    1/11 at 101.00    AAA    4,938,546 
2,930     5.500%, 1/01/19 – AMBAC Insured (Alternative Minimum Tax)    1/11 at 101.00    AAA    3,054,349 
3,600    Chicago, Illinois, Third Lien General Airport Revenue Bonds, O’Hare International Airport,    1/16 at 100.00    AAA    3,824,892 
     Series 2005A, 5.250%, 1/01/24 – MBIA Insured             
3,000    Chicago, Illinois, Third Lien General Airport Revenue Refunding Bonds, O’Hare International    1/12 at 100.00    AAA    3,170,070 
     Airport, Series 2002A, 5.750%, 1/01/17 – MBIA Insured (Alternative Minimum Tax)             
4,000    Cicero, Cook County, Illinois, General Obligation Corporate Purpose Bonds, Series 2002,    12/12 at 101.00    AAA    4,153,560 
     5.000%, 12/01/21 – MBIA Insured             
730    DuPage County Community School District 200, Wheaton, Illinois, General Obligation Bonds,    10/13 at 100.00    Aaa    770,004 
     Series 2003C, 5.250%, 10/01/22 – FSA Insured             
770    DuPage County Community School District 200, Wheaton, Illinois, General Obligation Bonds,    10/13 at 100.00    Aaa    827,973 
     Series 2003C, 5.250%, 10/01/22 (Pre-refunded 10/01/13) – FSA Insured             
4,000    Illinois Toll Highway Authority, State Toll Highway Authority Revenue Bonds, Series 2006,    7/16 at 100.00    AAA    4,164,800 
     5.000%, 1/01/26 – FSA Insured             
5,000    Illinois, General Obligation Bonds, Illinois FIRST Program, Series 2002, 5.250%, 4/01/23 –    4/12 at 100.00    AAA    5,230,900 
     FSA Insured             
2,700    University of Illinois, Certificates of Participation, Utility Infrastructure Projects, Series    8/11 at 100.00    AAA    2,820,204 
     2001A, 5.000%, 8/15/20 (Pre-refunded 8/15/11) – AMBAC Insured             
55,195    Total Illinois            58,018,027 
    Indiana – 15.8% (10.2% of Total Investments)             
3,380    Evansville, Indiana, Sewerage Works Revenue Refunding Bonds, Series 2003A, 5.000%, 7/01/20 –    7/13 at 100.00    AAA    3,517,532 
     AMBAC Insured             
    Indiana Bond Bank, Special Program Bonds, Hendricks County Redevelopment District,             
    Series 2002D:             
2,500     5.375%, 4/01/23 (Pre-refunded 4/01/12) – AMBAC Insured    4/12 at 100.00    AAA    2,659,650 
7,075     5.250%, 4/01/26 (Pre-refunded 4/01/12) – AMBAC Insured    4/12 at 100.00    AAA    7,489,383 
7,000     5.250%, 4/01/30 (Pre-refunded 4/01/12) – AMBAC Insured    4/12 at 100.00    AAA    7,409,990 
10,000    Indiana Health Facility Financing Authority, Hospital Revenue Bonds, Marion General Hospital,    7/12 at 100.00    AAA    10,347,200 
     Series 2002, 5.250%, 7/01/32 – AMBAC Insured             
25,000    Indianapolis Local Public Improvement Bond Bank, Indiana, Waterworks Project, Series 2002A,    7/12 at 100.00    AAA    26,582,248 
     5.250%, 7/01/33 (Pre-refunded 7/01/12) – MBIA Insured             
    Northern Wells Community School Building Corporation, Wells County, Indiana, First Mortgage             
    Bonds, Series 2001:             
420     5.250%, 1/15/19 (Pre-refunded 7/15/12) – FGIC Insured    7/12 at 100.00    AAA    446,779 
430     5.250%, 7/15/19 (Pre-refunded 7/15/12) – FGIC Insured    7/12 at 100.00    AAA    457,417 
1,675     5.400%, 7/15/23 (Pre-refunded 7/15/12) – FGIC Insured    7/12 at 100.00    AAA    1,793,037 
6,960    Valparaiso Middle School Building Corporation, Indiana, First Mortgage Refunding Bonds, Series    1/13 at 100.00    AAA    7,183,973 
     2002, 5.000%, 7/15/24 – MBIA Insured             
2,490    Whitley County Middle School Building Corporation, Columbia City, Indiana, First Mortgage    7/13 at 100.00    AAA    2,601,278 
     Bonds, Series 2003, 5.000%, 1/15/18 – FSA Insured             
66,930    Total Indiana            70,488,487 
    Louisiana – 3.3% (2.1% of Total Investments)             
3,280    Louisiana Public Facilities Authority, Revenue Bonds, Archdiocese of New Orleans, Series 2007,    7/17 at 100.00    AAA    2,954,099 
     Drivers 1755, 5.886%, 7/01/37 – CIFG Insured (IF)             
    Louisiana State, Gasoline and Fuels Tax Revenue Bonds, Series 2006:             
780     4.750%, 5/01/39 – FSA Insured (UB)    5/16 at 100.00    AAA    781,888 
8,280     4.500%, 5/01/41 – FGIC Insured (UB)    5/16 at 100.00    AAA    7,912,948 
3,085    New Orleans, Louisiana, General Obligation Refunding Bonds, Series 2002, 5.125%, 9/01/21 –    9/12 at 100.00    AAA    3,193,870 
     MBIA Insured             
15,425    Total Louisiana            14,842,805 
    Massachusetts – 1.2% (0.7% of Total Investments)             
2,630    Massachusetts College Building Authority, Project Revenue Bonds, Series 2006A, 5.000%,    5/16 at 100.00    AAA    2,740,486 
     5/01/31 – AMBAC Insured             
1,550    Massachusetts Water Resources Authority, General Revenue Bonds, Series 2005A, 5.250%,    8/17 at 100.00    AAA    1,673,241 
     8/01/26 – MBIA Insured             
925    Massachusetts Water Resources Authority, General Revenue Bonds, Series 2007, Residual Trust    2/17 at 100.00    AAA    780,728 
     7039, 5.809%, 8/01/46 – FSA Insured (IF)             
5,105    Total Massachusetts            5,194,455 
    Michigan – 0.3% (0.2% of Total Investments)             
1,500    Michigan State Hospital Finance Authority, Revenue Bonds, Trinity Health Care Group, Series    12/16 at 100.00    Aa2    1,506,555 
     2006A, 5.000%, 12/01/31             
    Missouri – 2.4% (1.6% of Total Investments)             
1,600    St. Louis County Pattonville School District R3, Missouri, General Obligation Bonds, Series    3/14 at 100.00    AAA    1,704,224 
     2004, 5.250%, 3/01/19 – FSA Insured             
8,735    St. Louis, Missouri, Airport Revenue Bonds, Airport Development Program, Series 2001A, 5.250%,    7/11 at 100.00    AAA    9,193,238 
     7/01/31 (Pre-refunded 7/01/11) – MBIA Insured             
10,335    Total Missouri            10,897,462 
    Nebraska – 2.0% (1.3% of Total Investments)             
6,360    Lincoln, Nebraska, Electric System Revenue Bonds, Series 2005, 5.000%, 9/01/32    9/15 at 100.00    AA    6,601,616 
    Municipal Energy Agency of Nebraska, Power Supply System Revenue Bonds, Series 2003A:             
1,000     5.250%, 4/01/20 – FSA Insured    4/13 at 100.00    AAA    1,055,760 
1,000     5.250%, 4/01/21 – FSA Insured    4/13 at 100.00    AAA    1,051,890 
8,360    Total Nebraska            8,709,266 
    Nevada – 2.1% (1.3% of Total Investments)             
8,750    Truckee Meadows Water Authority, Nevada, Water Revenue Bonds, Series 2001A, 5.250%, 7/01/34    7/11 at 100.00    AAA    9,209,025 
     (Pre-refunded 7/01/11) – FSA Insured             
    New Jersey – 0.5% (0.3% of Total Investments)             
2,150    New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Series 2006A,    No Opt. Call    AA–    2,334,277 
     5.250%, 12/15/20             
    New York – 5.0% (3.2% of Total Investments)             
1,120    Dormitory Authority of the State of New York, FHA-Insured Mortgage Revenue Bonds, Montefiore    2/15 at 100.00    AAA    1,167,981 
     Hospital, Series 2004, 5.000%, 8/01/23 – FGIC Insured             
3,660    Dormitory Authority of the State of New York, Revenue Bonds, Mental Health Services Facilities    2/15 at 100.00    AAA    3,817,417 
     Improvements, Series 2005B, 5.000%, 2/15/23 – AMBAC Insured             
3,130    Hudson Yards Infrastructure Corporation, New York, Revenue Bonds, Series 2006A:    2/17 at 100.00    AAA    2,985,582 
     4.500%, 2/15/47 – MBIA Insured (UB)             
2,400    Long Island Power Authority, New York, Electric System Revenue Bonds, Series 2006F:    11/16 at 100.00    AAA    2,250,792 
     4.250%, 5/01/33 – MBIA Insured (UB)             
1,500    Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Series 2005B,    11/15 at 100.00    AAA    1,560,255 
     5.000%, 11/15/30 – AMBAC Insured             
10,000    Metropolitan Transportation Authority, New York, Transportation Revenue Refunding Bonds,    11/12 at 100.00    AAA    10,341,700 
     Series 2002A, 5.000%, 11/15/30 – FSA Insured             
21,810    Total New York            22,123,727 
    North Carolina – 0.6% (0.4% of Total Investments)             
2,435    North Carolina Medical Care Commission, FHA-Insured Mortgage Revenue Bonds, Betsy Johnson    10/13 at 100.00    AAA    2,582,098 
     Regional Hospital Project, Series 2003, 5.375%, 10/01/24 – FSA Insured             
    Oklahoma – 0.5% (0.3% of Total Investments)             
2,000    Oklahoma Development Finance Authority, Revenue Bonds, Saint John Health System, Series 2007,    2/17 at 100.00    AA–    2,012,780 
     5.000%, 2/15/37             
    Oregon – 1.9% (1.2% of Total Investments)             
    Oregon, General Obligation Veterans Welfare Bonds, Series 82:             
5,560     5.375%, 12/01/31    12/11 at 100.00    AA–    5,689,882 
2,590     5.500%, 12/01/42    12/11 at 100.00    AA–    2,649,311 
8,150    Total Oregon            8,339,193 
    Pennsylvania – 3.4% (2.2% of Total Investments)             
4,500    Allegheny County, Pennsylvania, Airport Revenue Refunding Bonds, Pittsburgh International    No Opt. Call    AAA    4,857,210 
     Airport, Series 1997A, 5.750%, 1/01/13 – MBIA Insured (Alternative Minimum Tax)             
4,125    Pennsylvania Public School Building Authority, Lease Revenue Bonds, School District of    12/16 at 100.00    AAA    4,001,663 
     Philadelphia, Series 2006B, 4.500%, 6/01/32 – FSA Insured (UB)             
1,050    Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Series 2006A, 5.000%, 12/01/26 –    6/16 at 100.00    AAA    1,098,374 
     AMBAC Insured             
2,000    Philadelphia Municipal Authority, Pennsylvania, Lease Revenue Bonds, Series 2003B, 5.250%,    11/13 at 100.00    AAA    2,112,160 
     11/15/18 – FSA Insured             
2,000    Reading School District, Berks County, Pennsylvania, General Obligation Bonds, Series 2005,    1/16 at 100.00    AAA    2,117,960 
     5.000%, 1/15/19 – FSA Insured             
1,000    State Public School Building Authority, Pennsylvania, Lease Revenue Bonds, Philadelphia School    6/13 at 100.00    AAA    1,058,820 
     District, Series 2003, 5.000%, 6/01/23 (Pre-refunded 6/01/13) – FSA Insured             
14,675    Total Pennsylvania            15,246,187 
    Puerto Rico – 0.3% (0.2% of Total Investments)             
1,225    Puerto Rico Municipal Finance Agency, Series 2005C, 5.250%, 8/01/21 – CIFG Insured    No Opt. Call    AAA    1,352,584 
    South Carolina – 1.5% (0.9% of Total Investments)             
1,950    Greenville County School District, South Carolina, Installment Purchase Revenue Bonds, Series    12/16 at 100.00    AAA    2,012,264 
     2006, 5.000%, 12/01/28 – FSA Insured             
    Greenville, South Carolina, Tax Increment Revenue Improvement Bonds, Series 2003:             
1,000     5.500%, 4/01/17 – MBIA Insured    4/13 at 100.00    AAA    1,077,320 
2,300     5.000%, 4/01/21 – MBIA Insured    4/13 at 100.00    AAA    2,394,737 
1,000    Scago Educational Facilities Corporation, South Carolina, Installment Purchase Revenue Bonds,    10/15 at 100.00    AAA    1,045,270 
     Spartanburg County School District 5, Series 2005, 5.000%, 4/01/21 – FSA Insured             
6,250    Total South Carolina            6,529,591 
    Tennessee – 9.5% (6.1% of Total Investments)             
    Memphis, Tennessee, Sanitary Sewerage System Revenue Bonds, Series 2004:             
1,495     5.000%, 10/01/19 – FSA Insured    10/14 at 100.00    AAA    1,570,154 
1,455     5.000%, 10/01/20 – FSA Insured    10/14 at 100.00    AAA    1,525,393 
1,955     5.000%, 10/01/21 – FSA Insured    10/14 at 100.00    AAA    2,049,583 
10,000    Memphis-Shelby County Sports Authority, Tennessee, Revenue Bonds, Memphis Arena, Series 2002A,    11/12 at 100.00    AAA    10,612,500 
     5.125%, 11/01/28 (Pre-refunded 11/01/12) – AMBAC Insured             
10,000    Memphis-Shelby County Sports Authority, Tennessee, Revenue Bonds, Memphis Arena, Series 2002B,    11/12 at 100.00    AAA    10,612,500 
     5.125%, 11/01/29 (Pre-refunded 11/01/12) – AMBAC Insured             
15,195    Tennessee State School Bond Authority, Higher Educational Facilities Second Program Bonds,    5/12 at 100.00    AAA    16,126,453 
     Series 2002A, 5.250%, 5/01/32 (Pre-refunded 5/01/12) – FSA Insured             
40,100    Total Tennessee            42,496,583 
    Texas – 27.1% (17.5% of Total Investments)             
3,500    Dallas-Ft. Worth International Airport, Texas, Joint Revenue Refunding and Improvement Bonds,    11/11 at 100.00    AAA    3,714,760 
     Series 2001A, 5.750%, 11/01/13 – FGIC Insured (Alternative Minimum Tax)             
10,000    Gainesville Hospital District, Texas, Limited Tax General Obligation Bonds, Series 2002,    8/11 at 100.00    Aaa    10,343,900 
     5.375%, 8/15/32 – MBIA Insured             
1,210    Galveston, Texas, General Obligation Bonds, Series 2001, 5.250%, 5/01/21 – AMBAC Insured    5/11 at 100.00    AAA    1,254,431 
2,435    Galveston, Texas, General Obligation Bonds, Series 2001, 5.250%, 5/01/21 (Pre-refunded    5/11 at 100.00    AAA    2,554,997 
     5/01/11) – AMBAC Insured             
    Harris County Health Facilities Development Corporation, Texas, Thermal Utility Revenue Bonds,             
    TECO Project, Series 2003:             
2,240     5.000%, 11/15/16 – MBIA Insured    11/13 at 100.00    AAA    2,344,048 
2,355     5.000%, 11/15/17 – MBIA Insured    11/13 at 100.00    AAA    2,456,453 
13,000    Houston Area Water Corporation, Texas, Contract Revenue Bonds, Northeast Water Purification    3/12 at 100.00    AAA    13,681,590 
     Plant, Series 2002, 5.125%, 3/01/32 (Pre-refunded 3/01/12) – FGIC Insured             
1,000    Houston, Texas, First Lien Combined Utility System Revenue Bonds, Series 2004A, 5.250%,    5/14 at 100.00    AAA    1,060,790 
     5/15/24 – FGIC Insured             
4,345    San Antonio, Texas, Water System Senior Lien Revenue Refunding Bonds, Series 2002, 5.500%,    5/12 at 100.00    AAA    4,619,604 
     5/15/17 – FSA Insured             
5,930    Texas Department of Housing and Community Affairs, Residential Mortgage Revenue Bonds, Series    7/11 at 100.00    AAA    6,080,029 
     2001A, 5.350%, 7/01/33 (Alternative Minimum Tax)             
8,635    Texas Department of Housing and Community Affairs, Single Family Mortgage Bonds, Series 2002B,    3/12 at 100.00    AAA    8,825,920 
     5.550%, 9/01/33 – MBIA Insured (Alternative Minimum Tax)             
    Texas Public Finance Authority, Revenue Bonds, Texas Southern University Financing System,             
    Series 2002:             
3,520     5.125%, 11/01/20 – MBIA Insured    5/12 at 100.00    Aaa    3,665,587 
3,520     5.125%, 11/01/21 – MBIA Insured    5/12 at 100.00    Aaa    3,665,587 
    Texas Student Housing Authority, Revenue Bonds, Austin Project, Senior Series 2001A:             
9,400     5.375%, 1/01/23 – MBIA Insured    1/12 at 102.00    Aaa    9,954,130 
11,665     5.500%, 1/01/33 – MBIA Insured    1/12 at 102.00    Aaa    12,465,219 
5,000    Texas Water Development Board, Senior Lien State Revolving Fund Revenue Bonds, Series 1999B,    1/10 at 100.00    AAA    5,152,950 
     5.250%, 7/15/17             
9,145    Texas, General Obligation Bonds, Veterans Housing Assistance Program Fund II, Series 2002A-1,    6/12 at 100.00    Aa1    9,459,405 
     5.250%, 12/01/22 (Alternative Minimum Tax)             
    Williamson County, Texas, General Obligation Bonds, Series 2002:             
3,500     5.200%, 2/15/21 (Pre-refunded 2/15/12) – FSA Insured    2/12 at 100.00    AAA    3,692,745 
3,000     5.250%, 2/15/22 (Pre-refunded 2/15/12) – FSA Insured    2/12 at 100.00    AAA    3,171,420 
7,340     5.250%, 2/15/23 (Pre-refunded 2/15/12) – FSA Insured    2/12 at 100.00    AAA    7,759,408 
5,000     5.250%, 2/15/25 (Pre-refunded 2/15/12) – FSA Insured    2/12 at 100.00    AAA    5,285,700 
115,740    Total Texas            121,208,673 
    Washington – 14.9% (9.6% of Total Investments)             
5,385    Energy Northwest, Washington Public Power, Nine Canyon Wind Project Revenue Bonds, Series    7/16 at 100.00    AAA    5,143,698 
     2006A, 4.500%, 7/01/30 – AMBAC Insured             
6,600    Energy Northwest, Washington, Electric Revenue Refunding Bonds, Columbia Generating Station –    7/12 at 100.00    AAA    6,968,874 
     Nuclear Project 2, Series 2002B, 5.350%, 7/01/18 – FSA Insured             
7,675    Energy Northwest, Washington, Electric Revenue Refunding Bonds, Nuclear Project 1, Series    7/12 at 100.00    AAA    8,189,225 
     2002A, 5.500%, 7/01/15 – MBIA Insured             
2,500    Port of Seattle, Washington, Revenue Refunding Bonds, Series 2002D, 5.750%, 11/01/15 – FGIC    11/12 at 100.00    AAA    2,681,300 
     Insured (Alternative Minimum Tax)             
2,200    Snohomish County School District 2, Everett, Washington, General Obligation Bonds, Series    12/13 at 100.00    AAA    2,310,726 
     2003B, 5.000%, 6/01/17 – FSA Insured             
3,255    Thurston and Pierce Counties School District, Washington, General Obligation Bonds, Yelm    6/13 at 100.00    Aaa    3,467,421 
     Community Schools, Series 2003, 5.250%, 12/01/16 – FSA Insured             
    Washington State Economic Development Finance Authority, Wastewater Revenue Bonds, LOTT             
    Project, Series 2002:             
2,000     5.500%, 6/01/17 – AMBAC Insured    6/12 at 100.00    Aaa    2,128,380 
4,325     5.125%, 6/01/22 – AMBAC Insured    6/12 at 100.00    Aaa    4,501,936 
10,000    Washington State Healthcare Facilities Authority, Revenue Bonds, Children’s Hospital and    10/11 at 100.00    Aaa    10,487,900 
     Regional Medical Center, Series 2001, 5.125%, 10/01/31 (Pre-refunded 10/01/11) – AMBAC Insured             
15,000    Washington State Healthcare Facilities Authority, Revenue Bonds, Harrison Memorial Hospital,    8/13 at 102.00    AAA    15,495,899 
     Series 1998, 5.000%, 8/15/28 – AMBAC Insured             
5,170    Whitman County School District 267, Pullman, Washington, General Obligation Bonds, Series    6/12 at 100.00    Aaa    5,356,947 
     2002, 5.000%, 12/01/20 – FSA Insured             
64,110    Total Washington            66,732,306 
    Wisconsin – 2.8% (1.8% of Total Investments)             
11,950    Wisconsin, Transportation Revenue Refunding Bonds, Series 2002-1, 5.125%, 7/01/18    7/12 at 100.00    AAA    12,639,873 
     (Pre-refunded 7/01/12) – AMBAC Insured             
$      678,470    Total Long-Term Investments (cost $664,373,034) – 155.1%            692,656,299 
    Short-Term Investments – 0.2% (0.1% of Total Investments)             
$             850    Puerto Rico Government Development Bank, Adjustable Refunding Bonds, Variable Rate Demand        A-1+    850,000 
     Obligations, Series 1985, 3.490%, 12/01/15 – MBIA Insured (4)             
    Total Short-Term Investments (cost $850,000)            850,000 
    Total Investments (cost $665,223,034) – 155.3%            693,506,299 
    Floating Rate Obligations – (4.7)%            (20,950,000) 
    Other Assets Less Liabilities – 1.6%            7,062,184 
    Preferred Shares, at Liquidation Value – (52.2)%            (233,000,000) 
    Net Assets Applicable to Common Shares – 100%           $   446,618,483 

    At least 80% of the Fund’s net assets (including net assets attributable to Preferred shares) are 
    invested in municipal securities that are either covered by Original Issue Insurance, Secondary 
    Market Insurance or Portfolio Insurance which ensures the timely payment of principal and interest. 
    Up to 20% of the Fund’s net assets (including net assets attributable to Preferred shares) may be 
    invested in municipal securities that are (i) either backed by an escrow or trust containing sufficient 
    U.S. Government or U.S. Government agency securities (also ensuring the timely payment of 
    principal and interest), or (ii) rated, at the time of investment, within the four highest grades 
    (Baa or BBB or better by Moody’s, S&P or Fitch) or unrated but judged to be of comparable quality 
    by the Adviser. 
    The Fund may invest in “zero coupon” securities. A zero coupon security does not pay a regular interest 
    coupon to its holders during the life of the security. Tax-exempt income to the holder of the security comes 
    from accretion of the difference between the original purchase price of the security at issuance and the 
    par value of the security at maturity and is effectively paid at maturity. Such securities are included in the 
    portfolio with a 0.00% coupon rate in their description. The market prices of zero coupon securities 
    generally are more volatile than the market prices of securities that pay interest periodically. 
(1)    All percentages shown in the Portfolio of Investments are based on net assets applicable to 
    Common shares unless otherwise noted. 
(2)    Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. 
    There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities 
    may be subject to periodic principal paydowns. 
(3)    Ratings: Using the higher of Standard & Poor’s or Moody’s rating. Ratings below BBB by Standard & 
    Poor’s Group or Baa by Moody’s Investor Service, Inc. are considered to be below investment grade. 
(4)    Investment has a maturity of more than one year, but has variable rate and demand features which 
    qualify it as a short-term investment. The rate disclosed is that in effect at the end of the reporting period. 
    This rate changes periodically based on market conditions or a specified market index. 
(IF)    Inverse floating rate investment. 
(UB)    Underlying bond of an inverse floating rate trust reflected as a financing transaction pursuant to the 
    provisions of SFAS No. 140. 

Income Tax Information

The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to the treatment of paydown gains and losses, timing differences in recognizing taxable market discount, timing differences in recognizing certain gains and losses on investment transactions and the treatment of investments in inverse floating rate transactions subject to SFAS No. 140.

At July 31, 2007, the cost of investments was $646,009,649.

Gross unrealized appreciation and gross unrealized depreciation of investments at July 31, 2007, were as follows:

Gross unrealized:     
  Appreciation    $30,956,734 
  Depreciation    (4,411,402) 
Net unrealized appreciation (depreciation) of investments    $26,545,332 

Item 2. Controls and Procedures.

  1. The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
  2. There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: EX-99 CERT Attached hereto.


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)         Nuveen Insured Dividend Advantage Municipal Fund        

By (Signature and Title)*          /s/ Kevin J. McCarthy                    
                                                    Kevin J. McCarthy
                                                    Vice President and Secretary

Date         September 28, 2007        

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)*         /s/ Gifford R. Zimmerman                    
                                                   Gifford R. Zimmerman
                                                   Chief Administrative Officer (principal executive officer) 

Date         September 28, 2007        

By (Signature and Title)*         /s/ Stephen D. Foy                              
                                                   Stephen D. Foy
                                                   Vice President and Controller (principal financial officer) 

Date        September 28, 2007        

* Print the name and title of each signing officer under his or her signature.