We recently upgraded to exchange 2003 form 5.5. Since then we peridoically see a large number of simultaneous connections from the blackberry enterrpise server to the Exchange server. This seems to happen on some sort of schedule, but not completly sure. When this occurs exhnage slows down to a crawl for about 15 minuts after these connections occur. Nothing interesting appears in the event logs on either machine durring this time.