| Event Id | 57920 |
| Event Source | Backup Exec |
| Description | An error occurred while preparing Microsoft Exchange Server \\CORPEX01\Microsoft Exchange Directory to back up database Exchange DS Database. Error code: <error code> Error message: The Microsoft Exchange component specified is configured to use circular database logs. It cannot be backed up without a full backup. |
| Event Information | Backupexec will not perform a differential backup if circular logging is enabled. This is because a differential backup does not reset the archive bit or commit the transaction log files. Circular logging is a nice idea but makes backups a pain. Most organizations disable circular logging. |
| Reference Links | Veritas document Event 156 Occurs When You Use Seagate Backup Exec 7.0 to Back Up an Exchange Server |
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