well i was trying to update the Application ID URI to my appservice url. but it was showing the following error.
“Failed to update Application ID URI application property. Error detail: The Application ID URI must be from a verified domain within your organization’s directory.”
After looking it closely, i have found that the Home Page URL wasnt been set on the branding option in the App Registration, so set the app service url.

Try back again, That should resolve the error.
For some reason these steps didn’t work for me. I still get the same error after updating the Application URL with the URL of my function app.
Hi there,
Can you brief me more what you are facing at your end.
Regards,
Sure. I was facing the same error as you when trying to set the Application ID URI for my App Registration: “Failed to update Application ID URI application property. Error detail: The Application ID URI must be from a verified domain within your organization’s directory.” I tried to update my Home Page URL as you described, and I still get the same error.
In the Puublisher Domain, does it give you warning kind of icon? Try to update domain by clicking on Update Domain link
Yes I do see a warning icon. When I click on Update Domain > Select a verified domain > (My default domain). Nothing changes.
Is it required that I create a custom domain?
Sorry, not sure if this got posted or not, cant see my comment I previously made:
I tried performing these steps but still get the same error.
Hi there,
Can you brief me more what you are facing at your end.
Regards,