I wanted to know if anyone has come accross a size limitation that Activesync/OWA may have. we are currently using Exchange 2003 Enterprise SP2 and utilizing our OWA server for Activesync for our mobile/smartphones. We recently ran in to an issue while trying to syncronize a very large inbox (3.5 GB with over 85,000 items). The mailbox folder structure will replicate as well as sent items and deleted items. The phone seems to get hung up when it is syncronizing the inbox items that were not sorted. We do receive socket errors occasionally on the phone but not constantly as it continues to try to syncronize.