I have approx 20 users out of 300 that are having the same issue with Outlook 2010 connected to exchange 2010 v14.02.0247.005. Email messages are in their mailbox but outlook doesnt download them. They can log into the web client and see the messages. If they close and reopen outlook then they see the messages in thier ost.
This just started with 1 user and over about 30 days its up to 20
TIA
WP