I have an internal web site available to domain users. When the user is local and logged into the domain they can access the site fine. When they are remote and connected to the network (but not logged into the domain) via VPN they get a "401 - Unauthorized: Access is denied due to invalid credentials." after being prompted for their credentials. Why wont it accept their credentials? I tried adding folder permissions but that didn't seem to help.
Anonymous Authentication = disabled
ASP.Net Impersonation = enabled << my site needs to know who they are
Window Authentication = enabled
The server is win 2008 r2 running iis 7