Forum Discussion
Shared Mailbox between 2 tenants
I have 2 Office365 tenants. I need to setup shared mailboxes and calendars between the 2 groups. How can I do this? Is it possible. One tenant has an Azure Domain Controller. The other does not.
You cannot assign permissions to a shared mailbox to an account outside the tenant. One solution is to use Exchange's mailbox forwarding commands to make sure that any message sent to mailbox1 in tenant1 goes to mailbox2 in tenant2 as well (and vice versa).
You can use Set-Mailbox -ForwardingSmtpAddress to define a forwarding address in another tenant. And Set-Mailbox -DeliverToMailboxAndForward $True to make sure that a copy of any received message is kept in the target mailbox and forwarded to the mailbox in the other tenant.
I am looking to share the calendar. The forwarding does not allow the sharing of the calendar for all members of the shared mailbox.
Is there another way to share a calendar for users between tenant 1 and tenant 2.