When someone other than a backup operator is logged on to the console, scheduled backups run with backup operator credentials may fail with the following System event:
Event Type: Error Event Source: DCOM Event ID: 10002 Description: Access denied attempting to launch a DCOM Server.The problem is caused by the backup operators group not having the permissions required to run a scheduled task when someone other than a backup operator is logged interactively.
The only workarounds that I know are:
1. Use Administrator credentials.
2. Grant the required permissions using Dcomcnfg.exe:
a. Start Dcomcnfg.exe. b. Press Component Services. c. Press Computers. d. Press My Computer. e. Press DCOM config. f. Right-click Removable Storage Manager, and press Properties. g. Select the Security tab. h. Press Edit under Launch Permissions. i. Add the backup operators group.