Create a custom connector for a web API

I have gone through this link several times (among others), Create a custom connector for a web API | Microsoft Learn, and still am unable to successfully create a power automate custom connector to connect to my web api which is hosted in an Azure App Service.

I can obtain a token to the api and successfully connect using postman, however, when I try and do this through a custom connector (which uses a different token), I am consistently getting a 403 error. I have tried many different setting/combination of settings in Azure, as mentioned in this article but I still am not successful.

My web API code does not have any authentication or authorization dependencies as I am trying to do this by having Azure handle the authentication piece as mentioned in the link. I have the two App registrations created and set up as mentioned and feel I am close, I just feel like I am missing something.

Does anyone have any ideas on what I am missing or another set of steps that may help me do this?

My ultimate goal is to have Copilot Studio bot talk to this custom connector and interact with the API on behalf of the signed-on user.

Thanks!

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Authentication

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