Archive Configuration Manager site backups before the next snapshot replaces them

Source facts

The site-backup task replaces its previous snapshot on the next run rather than maintaining a series of earlier snapshots. Microsoft also warns that the old snapshot is removed before the new backup begins, so a failed task can leave no valid snapshot. A correctly placed AfterBackup.bat script is run after a successful task and can archive that completed snapshot. Microsoft Learn.

Applicability

Use this review for Configuration Manager sites using the Backup Site Server maintenance task. Identify the required recovery points and protected archive destination before changing the backup workflow.

DSE recommendation

DSE recommends assigning a separate acceptance check to archive creation and retention. Define the required generation history, control access to its destination, and make a failed archive visible to the backup owner. Review the post-backup script as operational code, including its error handling and the protection of required credentials.

Verification

Observe an approved backup cycle and confirm that a distinct archived recovery point is retained after a later cycle completes. Test the chosen recovery point through the organization’s approved restoration procedure. Keep backup success, archive success and restoration evidence separate so a passing maintenance task does not conceal a missing archive.

Official references

Microsoft Learn: Back up a Configuration Manager site. Source reviewed September 17, 2026.