Playing with the Azure Access Panel (myapps.microsoft.com) and needed to install the Access Panel Extension. I was using IE 11 at the time (Yeah - I know :-) ).
Problem was at the end of the install, it says "Click the Enable button" and said button was MIA.
Help file here: Troubleshooting the Access Panel Extension for Internet Explorer.
I didn't bother with the Diagnostic Tool.
There's a section that describes how to check if the extension is enabled.
Tools / Internet Options / Programs / Manage add-ons / Select Access Panel Extensions / Click Enable (bottom right).
Close and restart IE.