Authentication methods available for the app

[DBH1986]

Hello, I have this app deployed in Azure and I would like to add authentication so only my organization can access the App. I set it up to use our MS identity provider

Then set the redirect uri back to the app

It is hitting my companies identity provider but I am getting AADSTS900971: No reply address provided. It looks like I may have to configure something in the app itself to make this redirect uri, but on a quick code search nothing stood out to me. Is identity provider auth available for this application, and if not what authentication could I enable?

Thanks!