I keep getting this as an error message when I'm trying to set up my clients email.
| The mailbox is either inactive, soft-deleted, or is hosted on-premise. |

I keep getting this as an error message when I'm trying to set up my clients email.
| The mailbox is either inactive, soft-deleted, or is hosted on-premise. |
Hello,
When you are using Shared Mailbox with Dynamics 365 Business Central, the requirement is that you are using enhanced mail feature. For the authentication type we use OAUTH.
It is most likely that one of the members of the shared mailbox is not having a mailbox that is related to the customer tenant. We usually see this when partners use their own delegated partner account (for testing purposes). This is not allowed / not possible from technically point of view.
Thanks.