Inactive mailboxes in Exchange Online are a vital part of the Microsoft Purview Data Lifecycle Management capabilities. They offer a low/no-cost and versatile way of retaining mailbox data according ...
Updated May 18, 2023
Version 4.0
Blog Post
This is a nice post, and I hope the Inactive Mailbox recovery/restore pages on Learn/Docs get the deserved updates as well. It would have been great for this post and updated documentation to have been published BEFORE all the changes happened to break the Inactive Mailbox recovery/restore steps.
The cat is out of the bag, the additional shards that can result from auto-expanding archives, can result for other reasons too, which are out of the control of the customer. So this post ought to be targeted at all customers that use Inactive Mailboxes, not just customer that use auto-expanding archives.