Question : How to use only port 80 for Outlook Web Access

I need port 443 for another application and need to change Outlook Web Access to only use port 80.  How do I do this?

Answer : How to use only port 80 for Outlook Web Access

Would changing the OWA port to something else be an option for you?

https://yourserver.yourdomain.com:480/exchange

If not, you can simply disable FBA, which will remove the SSL requirement, and 80 should work - I would avoid that if possible though.

http://www.petri.co.il/configuring_forms_based_authentication_in_exchange_2003.htm

Kieran