Yes, several users have reported issues where archive mailboxes or shared mailboxes seem to disappear after a migration, especially in complex Microsoft 365 environments. In many cases, the data isn’t actually lost but may not be mapped correctly, or permissions and visibility settings weren’t preserved during the migration process. Problems can also arise due to incomplete synchronization, improper licensing, or skipped items during incremental migration.
Using a reliable solution Aryson Office 365 Migration Tool can help prevent these issues. It ensures complete migration of primary, archive, and shared mailboxes while maintaining folder hierarchy, metadata, and permissions. The tool’s advanced mapping and incremental migration features make sure no data is missed or duplicated. Additionally, its centralized dashboard allows administrators to monitor migration tasks in real time and verify that all mailboxes, including archives, are successfully transferred and accessible post-migration.

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