After a new installation or an upgrade on a MOSS server, you may start receiving a million DCOM errors in your System event logs. Thankfully, these are very easy to clean out. The error will look something like this:
The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID {<GUID>} to the user <server>\<service account> SID (S-1-5-21-<service account ID>). This security permission can be modified using the Component Services administrative tool.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
- Highlight and copy the GUID in the error description.
- Start > Run > regedit
- Click on the root node: My Computer
- Edit > Find… and paste the GUID into the textbox. Click Find Next.
- The right-hand pane should populate with the service information. Make note of the name in the Data field.
- Start > Administrative Tools > Component Services.
- Expand Component Services > Computers > My Computer > DCOM Config.
- Scroll down until you find the service name. Right click > Properties.
- On the Security tab, under Launch and Activation Permissions, make sure Customize is selected.
- Click the Edit button.
- Add the service account that was mentioned in the error description and give it Local Launch and Local Activation. (Some instances may need the remote launch/activation permissions as well.)
- Apply the changes and do an IISRESET.