Offboarding to on-premises from auto expanding archives is not supported

Originally posted by Microsoft Nov 16, 2022 Uncategorized 0 Comments

This message is related to moving (offboarding) users who have auto expanding archive enabled from exchange online to on-premises servers.

When this will happen:

Preview: We will begin rolling out mid-November 2022 and expect to complete by late November 2022

Standard Release: We will begin rolling out mid-December 2022 and expect to complete it by late December 2022

How this will affect your organization:

For Exchange Online users who have auto expanding archives enabled, we will block offboarding/moving their mailboxes to on-premises. This is because offboarding/moving content from auto-expanding archives is not a supported feature today. Please see details in the public documentation regarding Enable auto-expanding archiving. To quote “Auto-expanding archiving is supported for cloud-based archive mailboxes in an Exchange hybrid deployment for users who have an on-premises primary mailbox. However, after auto-expanding archiving is enabled for a cloud-based archive mailbox, you can’t off-board that archive mailbox back to the on-premises Exchange organization. Auto-expanding archiving isn’t supported for on-premises mailboxes in any version of Exchange Server.”

What you need to do to prepare:

Mailbox migrations to on-premises from auto expanding archives is not supported. Any on-going migrations will fail. The change we are putting out is to fail early and gracefully with no data loss by adding a check whether the auto-expanding archive exists for a user.

Message ID: MC467234