built in browser in Microsoft Teams for SSO (for logging into Office 365) displays poorly for CAS 5.1.x (responsive template ineffective)

[crdaudt]

We are using CAS v 5.1.4, and testing Office 365 SSO using the Microsoft Teams app.  Authentication is working, but the Login page is displaying poorly because the size of the window is not displayed properly for embedded browser in Microsoft Teams (I am not sure what the browser is).  I have attached a screen shot.  Is anyone familiar with how to adjust the responsive template within CAS so that the login page displays properly?