I'm just a user of Exchange and have more time under Lotus Bloats than I do under Exchange.

I recently read that the Exchange Server uses IRC/IRCX ports 6666-7000 (UDP) if a feature is turned on. Chat of some sort. Question is, what exactly does Exchange use these ports for? How about in relation to the webmail portal? Does Exchange use this set of ports for ActiveSync between mobile devices and their copr accounts?

What I have are logs showing Office 2010 webmail as the source port 443 going to mobile services (Verizon, Sprint, etc) as 6667 UDP.

I'm thinking this is just ActiveSync but I need someone with some experience to help out. Thanks.