The Office 365 In-Place Archive Not Showing in Outlook issue can happen when the archive mailbox is enabled in Microsoft 365 but does not display in the Outlook application. Users often experience this after changing Outlook profiles, enabling cached Exchange mode, updating Office, or migrating mailboxes to Exchange Online. In some situations, the archive folder appears on the web version but stays missing in Outlook desktop. Reviewing mailbox policies, repairing Outlook data files, re-adding the account, and verifying Exchange connectivity can help restore the archive mailbox. Before applying major mailbox changes, many users prefer using the Aryson Office 365 Backup & Restore Tool to safely back up Office 365 emails and archive data without risk of data loss.