scheduled backup of embedded database not working

Hello,

we are running SEP 14 on a Server with Microsoft server 2012. In SEPM scheduled backup of embedded database is set to Sunday at 14:00, but the backup of the database is not created (same happened in SEPM 12, never got it working). The manual backup is working fine, keeping the requested 4 versions, so it is not a matter of file security etc.

Are there any logfiles which I can check? I am wary to rely on manual backups, only.

Cheers,

Arne