Thanks for that

The database is first backed up by Maintenance Plan to a physical file, and then by Backup Exec SQL Server agent. Just had to look a little...

The backup is run by a 'Database Maintenance Plan' (which I did not setup) with a vanilla set of parameters for a daily backup.

However, a clue to the oddity may...

Thanks EdVassie, but that does not really address the issue.  I don't have a problem with internal SQL security on objects.

The issue is the delegated permission from Active Directory.  I...