Hi, I seem to have run into a rather weird issue with Exchange 2007 SP1. When any of our users try to connect through the internet to our Exchange servers via e IMAP from their home computers, Blackberry or android phones, they all report the same problem. They can connect to the server but they are continually prompted for their username and password. I have verified that I can telnet to either port 143 or 587 from outside of the company without any problems, but every time I try to connect to the Exchange server with a mail client or phone am presented with the same problem again. I have tried with multiple user accounts but to no avail.They can however access their mail through OWA. Does anyone know what could be causing this or of a possible fix?
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