MVC security authentication

Question

I am testing login with azure to add security to an existing MVC application. 

I use the example provided here: https://docs.microsoft.com/en-us/azure/active-directory/develop/quickstart-v2-aspnet-webapp

In development I click on login with Microsoft, i am redirected to the microsoft login page and all works perfectly.

I publish to use on  my site and in IIS I create an appplication name mssignintest off the main site 

I can go to https://mysite.com/mssignintest and launch the test mvc application,I get the login to Microsoft page

but when I click login with Microsoft It redirects me to https://www.mysite.com/mssignintest/PowerPanel/Account/LogOn?ReturnUrl=%2fMCSTickets%2fHome%2fSignIn

The creators of my website used application named Power Panels to design it.

What setting in my application do I need to edit so it behaves normally?