I think this is a simple yes/no question. It's kind of a difficult one for me to test out on my own without having a full environment for testing with so I thought I'd ask it of the community. :)
I was wondering if it's possible to have an Exchange/Office 365 hybrid deployment where the mailbox is UM enabled but the UM servers be on-premise rather than in the cloud? My understanding is that Office 365 is essentially considered another Exchange organization and this is something that isn't possible, but as I said I haven't a great way to test this out.
Thanks for any help!
Eric