The community exchange service broker (which per K2 community is no longer being maintained) would allow for K2 to see into shared mailboxes, list emails, etc. I am told that the integrated Exchange broker in K2 5.x does NOT have this feature. It needs to be added...we need to have the ability to manage emails via K2 for shared mailboxes.

While you're at it, the 'move email' method also needs to have a return property with the new email ID of the email. That's necessary functionality.