365 OWA "Open another mailbox" oddness this (29th Feb) morning?

[pete]

I've had a couple of users report (and one demonstrate) that when they try to access a shared mailbox via the "Open another mailbox" routine in Outlook Web Access, it simply opens another version of their mailbox.

 

If they open a new tab and go to https://outlook.office.com/mail/[email protected] the shared mailbox opens fine.

 

Permissions are correct, worked yesterday, 365 broken things list doesn't mention anything related (though that is usually delayed).

 

Anyone else had it this morning?

[FragglePete]

Yes - I've had reports of this as well this morning. Tried it myself and indeed, all it does is open up my own mailbox. I've raised an issue with Microsoft.

 

Pete

[Michael]

Yes - Microsoft have published an advisory in O365 they're removing an Exchange update. There's an update due at 11am today, however it was already working when I tried 10 minutes ago.

[DalekSec]

It's Office 365, not 366, so today is it's day off