I am currently working on Exchange 2007. I am running into a same problem with users that are trying to access OWA using the https://mycompany.com/exchange virtual directory. I have setup Basic auth on all my virtual directories on IIS and set them with correct domain. When a 2003 mailbox user authenticates they are presented with their 2003 OWA mailbox without any problems. If a 2007 mailbox user accesses https://mycompany.coml/exchange and use only their user name “john” they are prompted with “The user name or password that you entered is not valid. Try entering it again.”. If I use “mycompany\john” they are proxied to the /OWA virtual directory correctly and are presented with their OWA 2007 Mailbox as they should be. This is going to be a huge headache if I cannot have my users access the same URL. Here are my environment details

O/S – Windows 2008 Enterprise edition SP2
MS Exchange 2007 SP3 (CAS and Mailbox roles are installed on different machine)
IIS-7

Can you please share your ideas on how to resolve this?

Thanks in advance.

i was missing some iis role services

colleague of mine installed and didnt do a proper check of the pre-reqs