I have already set up multiple URLs that direct to the log on page for my HEAT SM application, but SSO doesn't work on any of these alternate pages. In addition, they all show the Application drop down.
Starting in HEAT SM 2016.1.1, each tenant in the ConfigDB has the "Alternate Login URL" tab. You can add additional URLs for login here, following the same conventions as the LoginURL. This will allow SSO to function correctly, and will remove the Application dropdown from those URLs as well.