RDM Roles with Active Directory groups not working

With the .NET provider you need to specify Integrated but you can't specify the username and password. What message do you get?

http://stackoverflow.com/questions/830929/database-windows-authentication-username-password

Unable to connect to the server !
Login failed for user 'DOMAIN\MYUSER'

When I deactivate the "Integrated security (Active Directory)", can i still use an AD user in the user field?

No, you can't specify user/password and use integrated security(SSPI) they are mutually exclusive.

In the case where the connection string contains both, SSPI will always take precedence.

http://blogs.msdn.com/b/spike/archive/2008/11/14/connectionstrings-mixing-usernames-and-windows-authentication-who-goes-first.aspx

When using SSPI, the login is negotiated via security tokens between the client and server not an actual user/password.

If you need to connect using other credentials (other than the one currently logged into the Windows box) you can use the Run-As command method outlined here:
http://help.remotedesktopmanager.com/index.html?tipsandtricks_runas_rdm.htm

When checking "Integrated security (Active Directory)" does the "Test Server" button succeed?

Does every user need to be created in RMAD or is the memebership of the Role group enough?

Not necessarily. You need to make sure the role group has login rights to the server and a mapped user in the database.

Something like:

http://dba.stackexchange.com/questions/2572/how-do-i-assign-an-entire-active-directory-group-security-access-in-sql-server-2