Options (some better than others!) are: 1. Move all Apps to MS seamless 2. Have an app called "Reset your password" (Or similar) that uses MS Seamless.then you can leave all the other apps as they are 3. Turn off Deferred authentication and set up our Password Reset service instead so people reset their password before logging in. 4. Use Full Desktop instead of seamless 
When logging in to RDS via web access or app portal the keyboard doesn't work after deferred authentication onto the RDS session host. Deferred authentication works fine, passes you through to the RDS host, then when trying to reset your password, the keyboard doesn't work.  Has anyone else had that..?
Keyboard doesn't work after deferred authentication on RDS Session Host