Problem
You would like to migrate Exchange 2016 resource mailboxes from one database to another but noticed that the Move Mailbox To another database is not available when you select the resource mailbox:
Shared mailboxes does not have this issue:
Solution
I’m not sure if this is by design but to move the resource mailboxes to another database via the Exchange admin center, use the migration option as such:
Using this wizard will allow you to select the resource mailboxes:
