Forum Discussion
Exchange Online Shared Mailbox SMTP and IMAP
Hello everyone, I have a following scenario which used to work couple of months back: We have an internal e-mail support (ticketing) system. Now in order for it to receive and send e-mails (through ...
As far as I know, a true shared mailboxes have never allowed direct logon. Its the whole reason they dont require a license for that mailbox. https://technet.microsoft.com/en-us/library/jj966275(v=exchg.150).aspx
If that worked before, then maybe it was a bug or wasnt implemented correctly yet in your tenant.
Regardless, if you want to be able to logon directly to it, you will need to covert it to a regular mailbox and apply a license, or if you are in hybrid mode, move it back on-prem.
So in general, the mailboxes used with SMTP client submission need to be licensed in order for to be used - is that correct?
Yes, if you are authenticating as that mailbox, it will need a license.