Forum Discussion I'm very much aware of the license requirements for Shared Mailboxes in Exchange Online and for all Shared Mailboxes we always give licensed users access to them. If we need to login to the actual shared mailbox, we assigned them a license. This could be necessary if you also have some 3rd party application that actually need to login to the mailbox and fetch e-mail for some reason. I have recently realized that you CAN actually set a password to a Shared Mailbox. Just go to admin.microsoft.com > Users > Active Users > select the Shared Mailbox > Reset password. After this, you can login with the username/password. Of course, if you access it via portal.office.com you won't see Outlook but if you go directly to outlook.office365.com you will get access to the mailbox. Anyone know anything more about this feature? Limitations?

I'm not looking to break the licensing terms, all our physical users for all our customers have their own personal accounts but there are scenarios where you have a 3rd party application accessing the mailbox for some reason. VasilMichev Nov 01, 2018 This "feature" has been around for years, but despite probing Microsoft numerous times about it, we haven't received a clear answer. Until we do so, assume that it's unsupported, and that it breaks the license agreement. Applications should still be able to access the mailbox via delegate/impersonation permissions. Marked as Solution This "feature" has been around for years, but despite probing Microsoft numerous times about it, we haven't received a clear answer. Until we do so, assume that it's unsupported, and that it breaks the license agreement. Applications should still be able to access the mailbox via delegate/impersonation permissions.