Error in Exchange 2010 OWA rule publishing on TMG
Post publishing OWA rule on a TMG server, clients get error “You could not be logged on to Forefront TMG. Make sure that your domain name, user name, and password are correct, and then try again.”
OWA rule is configured as per Microsoft guidelines with basic and form based with windows active directory authentication.
Exchange 2010 is also configured to use basic authentication
OWA page is coming but Login is not working and also giving the following error:
“You could not be logged on to Forefront TMG. Make sure that your domain name, user name, and password are correct, and then try again.”
This error defines that there is some issue in login but you will try all the possible things to make it working.
This will come because Threat Management Gateway server is part of workgroup which can’t authenticate users and in OWA publishing rule Users scope is selected to all authenticated users.
On OWA Publishing rule change the Users Tab scope from all authenticated user to all users.
Make the TMG part of domain but this will not be recommend to make a firewall part of domain.