With Signal's recent upgrade to version 1.2, you will now see a login screen for the CRM.
House of Representatives: Simply login with the same credentials you use to log into your computer in the morning. The reason for this change is explained below.
Non-Congressional: Log in with your Signal CRM username and password.
In order to support multiple web browsers (in future versions of Signal CRM), the automatic "Windows Authentication" has been removed from Signal CRM. Instead, you are now presented with a login screen when initially connecting to Signal.
While Internet Explorer is still required at this time, this change brings Signal one step closer to browser independence.