In Mail Manager can open the mailbox you are using on the inbound e-mail section, then click on the test icon on the tool ba at the top.
If this fails can you check in Exchange that the e-mail account you are trying to poll has the IMAP protocal enabled.
Do you get any error in the windows event log?
Hope this helps.
Thanks for the replys guys,
The forwarding was not on so that was not an option but thanks again.
I tried the test and i got the error " failed to connect to server named (our servername) :with username (our username)"
I had a look and the account has imap protocol enabled in exchange
The error I get in the event viewer is the same as the above error.
I think I have the exchange server wrong so will find out the primary server name and check that