We have a need to be able to use a custom URL (e.g. d365.contoso.com) to access D365 applications.

If there was the ability to configure a custom URL that would likely work, but we have a slightly different requirement for this….

We have an add-on product for D365 (http://www.linguaskin.com/applications?p=D365, though it also works for HR, Business Central, etc) that enables us to create a switchable multilingual interface. This works as a software reverse proxy, running as a custom module within IIS. This is deployed on an IIS/Azure server separate to the D365 application (and hence under a custom URL) and proxying to the *.*.dynamics.com URL.

Our issue is that the AD authentication process results in a redirect_uri that redirects the user to the D365 *.*.dynamics.com URL. To get this redirect_uri to redirect back to our custom URL, we need to have the whole AD login process configured to run through our proxy to enable us to apply that rewrite. This works but is clumsy and fragile.

We have tried authenticating through an ‘App Registration’ in AD with an API Permission for user_impersonation for Dynamics CRM, but that doesn’t work.

So, the solution that would work for us is:

- Ability to define a Custom URL so that the redirect_uri at the end of the authentication process will redirect the browser to that URL

And/Or

- Ability for D365 to allow an AD app to be used for authentication and for that app to be able to have access to D365.

I think this describes our situation, but please contact me for further information if required.