Scheduled backup fails with "Error creating zip file" (4353321)

Scheduled backup fails with "Error creating zip file" or "Critical Error: Domain [DomainName] backup failed. Error creating backup file" .

Active Administrator may show that the backup "completed with warnings"  A backup file is created, but is corrupted and contains no data

• The Active Administrator Foundation service has been set to run as something other than Local System
• Active Administrator Foundation service account does not have proper permissions to the ActiveAdministrator share, ADBackups folder, or SQL.  

Open Services.msc on the Active Administrator server and verify that Active Administrator Foundation Service is running as 'Local System'

Restart the Active Administrator Foundation Service

Check the NTFS permissions on the ActiveAdministrator share to make sure the Active Administrator Foundation Service account has FULL control on the folder

Note: The Active Administrator Foundation Service account should be a member of the Domain Admins group and the AA_Admin group.