Microsoft has released the View Another Mailbox feature for the new EAC. This is part of the build-out of the new EAC functionality before the retirement of the old EAC. Interestingly, the new feature depends on the old Exchange Control Panel dating back to Exchange 2010. Things aren’t quite as modern and fast as Microsoft says they are.
From April 2021, Exchange Online will apply hard limits for the number of messages a mailbox can receive per hour. The limit remains the same (3,600), but now Exchange will block the mailbox receiving any more email for an hour. The new version of the Exchange Admin Center (EAC) promises to highlight problem mailboxes so that admins can ask owners why their mailboxes receive so much email.
Microsoft says that the new EAC is ready to use. While we don’t deny the fact, we think some of the magic that existed in previous portals has gone. PowerShell is replaced by the Graph as the foundation for the EAC. Progress happens, but it’s sad when a feature like command logging is left in the mists of the past.