Improving the Processing of Protected Messages in Shared Mailboxes

A sometimes overlooked 2024 update delivers easier access to protected messages delivered to shared mailboxes. Instead of direct assignment of Full Access to user mailboxes, access can be controlled through membership of a mail-enabled security group. It’s a small but very nice change, just like any update that eases the life of tenant administrators.

https://office365itpros.com/2025/07/09/shared-mailbox-access/