Update Veeam Backup for Microsoft 365 8.2 and Cumulative Patches
Veeam released a version of Veeam Backup for Microsoft 365 v8.2.0.2202 (P20251031) on November 06, 2025, and it resolved the issue – A backup job may fail when processing Archive Mailbox objects with the following error:
Processing archive mailbox: username@organization.com failed with error: Mailbox is not fully configured.
