I have a problem where outlook adds the sender to emails that are reply all'ed to. It adds all the other people that the email was sent to but I don't want it sent to me as well.
Any ideas???

That's by design - all include everyone. I don't think you use 'reply all' very often, just remove yourself from the recipient list, it probably takes you a few seconds to press the delete key.

It didn't happen before we move from a POP server to a hosted exchange service.
Normally you wouldn't have the person actually sending the email added to the cc list by default, you sent the email so why would you want it sent to you???
I have not seen this anywhere else.

Sorry, my bad. I'm not sure how hosted exchange service works. Does outlook have to talk to the server before you hit the send button? Disconnect the network when you click 'reply to all', what would happen?