DCOM 10016 Errors with SharePoint 2007 and Windows Server 2008 R2

It seems that by default SharePoint 2007 has some DCOM/IIS related issues on Windows Server 2008 R2.  I've run into this error multiple times on multiple servers:

EVENT ID: 10016
SOURCE: DistributedCOM
The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID




to the user DOMAIN\USERNAME SID (S-1-5-21-000000000-3444370893-82664450-4606) from address LocalHost (Using LRPC). This security permission can be modified using the Component Services administrative tool.

This error is related to the DCOM launch and activation permissions for the IIS WAMREG admin Service.  Typically you can resolve this error by granting the needed permissions in Component Services.  With Windows Server 2008 R2, all of the tabs are disabled.

To fix this error:

  1. Click the "Start" menu and then "Run..."
  2. Type in "regedit" and click "OK"
  3. Navigate to HKEY_CLASSES_ROOT\AppID\{61738644-F196-11D0-9953-00C04FD919C1}.  You could also press "CTRL+F" and search for {61738644-F196-11D0-9953-00C04FD919C1}.  It will be the first key found.
  4. Right click on the key and choose "Permissions".
  5. Click on the "Advanced" button.
  6. Choose the "Owner" tab.
  7. Choose the "Administrators" group and click "OK".
  8. On the permissions dialog, grant the "Administrators" group full control and click "OK".  Close regedit.
  9. Open Component Services from the Administrative Tools menu.
  10. Locate the IIS WAMREG admin Service.  Right click on it and choose "Properties".
  11. Click on the "Security" tab.
  12. Under "Launch and Activation Permissions", click on the "Edit" button.
  13. Click the "Add" button and add the WSS_WPG & WSS_ADMIN_WPG groups.  You may need to change the Location to the server you're working on if you're on a domain.
  14. Check the "Local Activation" boxes for each of teh WSS groups. Click "OK"
  15. Click "OK" on the permissions dialog.
  16. Reboot the server.

Note that this will need to be done on each server in your SharePoint farm.

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