SharePoint: DCOM Error 10016

I you get Access Denied errors in SharePoint then take a look at Event Viewer to see if there are some DCOM 10016 Event Errors in System log: The application-specific permission settings do not grant Local Launch permission for the COM Server application with CLSID {A9E69610-B80D-11D0-B9B9-00A0C922E750} to the user NT AUTHORITY\NETWORK SERVICE SID (S-1-5-20) from address LocalHost (Using LRPC). This security permission can be modified using the Component Services administrative tool. If there is such error then follow the steps below to get this error fixed.

  1. Open Administrative Tools –> Component Services.
  2. Move to Component Services –> Computers –> My Computer –> DCOM Config.
  3. Select IIS WAMREG Service, right click on it and select Properties.
  4. Move to Security tab and click Edit button to open active permissions section.
  5. Click on Add button and add NETWORK SERVICE to list.
  6. Make sure you check the check box Allow for Local Activation rights.
  7. Click Ok twice and close Component Services.
  8. If you still get error then restart your server so changes are applied for sure.

Sometimes you may see some other account name instead of NETWORK SERVICE. If there is another account name then follow the steps above but instead of NETWROK SERVICE give permissions to account mentioned in Event Log message.

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