Apr 30 2020 04:35 AM
We have a client with two separate companies - call them AB and ABCD. They were originally set up under one Office 365 tenant, using two different domains, but were then split as they both needed the same mailbox addresses (sales@ab.com and sales@abcd.com for example), which was not possible under the same tenant.
They now each have an Office 365 setup with their respective domains. However we now have a situation where users from company AB need to access the shared mailbox on ABCD (sales@abcd.com) which is in a different Office 365 tenant. Is there any way to set this up?
Apr 30 2020 06:25 AM
Apr 30 2020 06:47 AM
@gmtsolutions Too bad it wasn't a custom domain ;) Shared mailboxes are useful and suit their purpose (we have a bunch of them). But would it be an alternative to set up M365 groups instead as your current need isn't supported?
Apr 30 2020 07:05 AM
Apr 30 2020 08:54 AM
Mailboxes can only be accessed by users in the same O365 tenant, what you are asking for is not possible.