After applying the December 2016 update I have attempted to set up the App for Outlook.

When opening the app I see the ADFS login screen appear in a popup window. I complete the login details but am then just shown a blank web page instead, and the "Having trouble signing in?" message is displayed within the app.

Using the F12 developer tools in the popup IE window seems to indicate there are JavaScript errors on the page (attempting to access properties of the window.opener object, which is undefined)

There are further reports of this issue on the community site at https://community.dynamics.com/crm/f/117/t/221514?pi51685.