Shared mailbox in tenant without Exchange online license

Copper Contributor

I have a tenant with a single Exchange Online (Plan 1) mailbox and a shared mailbox that was forwarded to an external address. This worked fine until the Exchange Online mailbox was remove and only a single shared mailbox remained.

Is my conclusion that a tenant needs an Exchange Online license to make a shared mailbox work?

6 Replies
Yes, you will need at least one Exchange license, otherwise the Exchange workload as a whole will get deprovisioned. The shared mailbox itself does not need a license, generally speaking.
Hi Vasil, thanks! That is interesting; never knew this.
I cannot find written sources about this, do you have some references on this behaviour? I have to register it in our procedures.
Reference for what, that you need a license in order to use the service? :)
Yes, or put differently, that you cannot use shares mailboxes without at least one Exchange Online license.
It's not about shared mailboxes, it's about using the Exchange Online service as a whole. You need at least one valid license for that, if you don't have such any feature dependent on the service will not be available, shared mailboxes included.
I know, so do you have a Microsoft text about this?