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Shared Mailbox Access
Hi, I have remove the license of a mailbox, and convert the mailbox to Shared Mailbox. However the Shared Mailbox can still be accessible by signing-in from OWA. Is that the normal behavior? On...
Well, given that O365 is a cloud service, available anywhere from any location, not changing the password for a departed user is just asking for trouble. Anyway, Microsoft's guidance on the whole "departed" user is still a bit unclear, they've positioned "inactive mailboxes" for this scenario, but then did the whole "convert to shared mailbox" thingy as part of the "remove user" wizard. Here's an article from a while back where I compare the two methods: https://practical365.com/exchange-online/shared-mailboxes-vs-inactive-mailboxes-departed-users/
Yes, that's the expected behavior. If you don't want people to access the mailbox anymore, remove the permissions.