I have just setup a client with Office 365 Exchange. The old SBS server is still on site but I have stopped all the Exchange services.
When I try and add the new profile it goes away to autodiscover the account but seems to find the old SBS exchange rather than the Office 365 Exchange.
If I setup a non domain computer with the new email it works fine on the same LAN. I even tried unplugging the SBS server to see if I can connect but it will not work