When a Account Server DB Backup is initiated from the SP Console, the Console GUI states that the backup is successful, yet the Account Server logs state it failed (see below)
11:34:53 Info: [RPC from firstname.lastname@example.org"] service.BackupDatabase
11:34:53 Warn: Could not backup StoragePlatform database: Cannot open backup device 'C:\ProgramData\Attix5 Pro\AS_Service\ServerBackups\Backupserver.bak'. Operating system error 5(error not found), BACKUP DATABASE is terminating abnormally.
This occurs when the MS SQL service logon is set to a user, eg NETWORK_SERVICE, and this user does not have sufficient rights to access the backup folder. The DB backup is therefor unable to write the backup file to this folder resulting in a failed backup.
Change the MS SQL service logon to LocalSystem (default value);
Change the backup folder pemissions - allow the current MS SQL service logon access to this folder.