I have a situation where I'm using GFI Mail Achiver version 4 and it uses mapi to connect to the exchange server. Mapi is on port 443 which is also used by OWA. Every time I turn on mapi to allow the GFI Archiver to do it's job the server is brought to it's knee's and gets really slow. I would like to change the mapi port from 443 to something else in order to block outside attemps to access it and allow GFI archiver to do it's job.
I hope this makes sense.