SSO setup with EntraID fails

Hello guys,

I`m drawing a blank here and so far, support hasn`t come back to me so I hope someone else is able to help here.

Yesterday I started the process (described here Configure SSO authentication with Microsoft Azure - Devolutions Documentation) to setup SSO with EntraID.

I verified the domain, created a new Enterprise app and App registration as per documentation. But once I hit bullet point 29, I get the following error message when I try to sign in.

Sorry, but we’re having trouble signing you in.
AADSTS500113: No reply address is registered for the application.

The error message is clear, so I double checked all the steps described but couldn`t find a step where I actually set the reply address.

So I have these questions:
1) Is the documentation complete or is there something missing?
2) Where do I set the reply address and
3) What reply address should I use (I already put https://login.devolutions.com/op/login/callback as redirect URI)?

Thanks in advance
René