The error you are experiencing is a fairly broad one and could mean that you have an incorrect
username/pwd, or a mismatch with the communication between the ACS server and the windows domain if,
you are using External User Databases. Could you please confirm whether or not you are using a back
end to an external user database, in particular, a Windows domain? One thing that I have found
quite common in this circumstance is that the external user database is configured to check for
"Grant Dial-in Permission for user". If the user does not have this set (regardless of the fact
that this is not a dialin session), it will fail the authentication request.
By the way, what version of ACS is this?
Thanks,
yatin
