MC720777 — Microsoft Exchange Online: Release of View Another Mailbox feature in the new Exchange admin center (EAC)

Microsoft Exchange Online will release the View Another Mailbox feature in the new Exchange admin center (EAC) in late February 2024, with worldwide rollout expected to complete in late March 2024. The new feature allows users to manage all mailboxes they have permissions for and offers a modern, faster, and easier-to-use experience. Admins can access the new experience by clicking the 'View another mailbox' link, and the old EAC experience will be retired mid-2024.