Forum Discussion
Shared Mailbox can have a password and login enabled without license
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.
Hello,
Reviving this question as I accepted this answer too back in 2022/23, however, it does work and you can access a shared mailbox directly.
When you created a shared mailbox, it creates a corresponding user account inder Active users, however if you have multiple domain, it will take the default domain as the suffix.
I usually change the UPN domain to match the shared mailbox and delete the leftover alias/secondary upn.
Set a password.
Now you can access it directly using the UPN (under Active users) and the URL has to be exactly this format.
https://outlook.office.com/mail/email address removed for privacy reasons
Obviously replace the address with the correect shared mailbox email.
It's 2025 and I needed to do this for an external user accessing a shared mailbox and this worked.