ASP.Net redirecting to local host after authentication

Question

I just created a webform that is hosted in my Azure subscription. I set it up with authenication via my works Azure directory for authenticating users. In debug this works f

Answer 1

I also had this issue and took these steps to resolve

1. navigate to the app registration in AAD
2. Open the manifest
3. Change the ReplyUrl to the url of the app (e.g. http://appname.azurewebsites.net)

Then I got the error

Bad Request - Request Too Long HTTP Error 400. The size of the request headers is too long.

Next I cleared all cookies from the browser, and this changed the error to just

Bad Request

So I went back to that ReplyUrl and changed it to https://appname.azurewebsites.net/.auth/login/aad/callback and now it appears to work.

Note I also had to make sure I didn't have the site open in any other tabs before it started working