Q. Does IM Auth support single sign on (SSO) using the Windows Active Directory user database for both the InterMapper web based and RemoteAccess users?
A. This is possible for InterMapper RemoteAccess, but not the web server.
Using the IMAuth app from InterMapper DataCenter, you can set the authentication type to Kerberos (this is what AD uses internally for single sign on). Kerberos takes some additional work to configure.
There is now a Forum article for Kerberos.