I currently use an Exchange 2007 server. I have built an Exchange 2010 server and have begun to migrate my users over. I still have 10 users running off the 2007 server because they are the only users that recieve email on smartphones. I need to know if it is possilble to migrate these new users onto the 2010 server and and still provide the OWA and email delivery to the smartphones. If so how do you set this up? My goal was to move everyone including the smartphone users onto the new server and once everything is working correctly then remove the 2007 server.