Network Authentication Error

If you see this text in the backup log and your backup destination is a password protected network share then you may need to and the network authentication details in the Macrium Reflect defaults:


Validating location:	\\Server\share\ - Invalid (Logon failure: unknown user name or bad password.)
Note: Interactive backups may run without a problem, and you may only see this error for scheduled tasks.


Take the 'Other Tasks' > 'Defaults' menu option and click the 'Network' button: