We are in the process of migrating our client over from POP to Exchange 2010. We are getting some complaints from users that when the perform a send receive, it takes a very long time. They said that the send receive completes quickly for the pop account but it takes forever for the exchange account. I don't believe any errors pop up, it just takes a very long time to perfom the send/receive. Any help would be appreciated.The outlook clients are a mixutre of 2010, 2007 and 2003.