I’ve fought with this before, and am getting it again on a fresh SBS R2 install in monitoring reports (and the Event Viewer/System log):
The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID {E579AB5F-1CC4-44B4-BED9-DE0991FF0623} to the user NT AUTHORITY/NETWORK SERVICE SID (S-1-5-20). This security permission can be modified using the Component Services administrative tool.
It took a long time to track down/fix the first time. It was faster this time, but I’m documenting it now for future reference. I underlined the important bits above.
First connect the dots:
- Looked up that CLSID with regedit in HKCR\CLSDID\{E579AB5F-1CC4-44B4-BED9-DE0991FF0623}
- Looked up its AppID there: {56BE716B-2F76-4dfa-8702-67AE10044F0B}
- Open Component Services: Start > Run > dcomcnfg
- (Guess that it’s VSS related since SBS often has VSS errors, and) open My Computer > DCOM Config > Volume Shadow Copy Service > properties dialog.
- Confirm Volume Shadow Copy Service has that Application ID: {56BE716B-2F76-4dfa-8702-67AE10044F0B}
Then actually make the fix:
- Open Security tab > Launch and Activation Permissions > [Edit] button
- [Add] Network Service, [OK]
- Allow Local Activation permissions to Network Service, [OK], [OK]
My opinion: connecting the dots shouldn’t be so nearly much more involved than making the fix.
(Credit to this article for documenting the basic troubleshooting process.)