Adventures with Power Apps: Create a Custom Connector for an API Hosted in an Azure Function Secured with Azure AD

I have an Azure Function that is secured with an identity provider that authenticates against Active Directory.

I configured the identity provider using the app registration I created in a previous article, see Adventures with Power Apps: Create a Custom Connector for an API Hosted in Azure APIM Secured with Azure AD – Matt Ruma.

Now my Azure Function is secured with Active Directory. If I try to run it from Postman or from the Test/Run in the Azure Portal, I receive a 401 status code.

I created two HttpTrigger functions in my Azure Function using the Azure Functions OpenAPI Extension, one called Function, that returns a list of people, and another called Function2, that returns the details of a person.

Prior to enabling the identity provider, I downloaded a copy of the swagger.json for the Azure Function from https://MY_FUNCTION_NAME.azurewebsites.net/api/swagger.json.

Now to create a Custom Connector for this Azure Function in the Power Platform.

I navigated to https://make.powerapps.com.

From the Power Apps menu blade, I selected Dataverse and then selected Custom Connectors.

I then clicked New custom connector and selected Import from OpenAPI file.

I provided a Name and selected a file to Import, then clicked Continue.

I configured the security, using OAuth, just like I did in Adventures with Power Apps: Create a Custom Connector for an API Hosted in Azure APIM Secured with Azure AD – Matt Ruma.

I then clicked Update connector.

I am using Function security in my Azure Function, so I will need to create a new policy to pass the App Key for the function.

From the Definitions tab, I clicked New policy.

Set Template to Set HTTP header.

Set Header name to x-functions-key.

Set Header value to the Azure Function App Key.

I clicked Update connector.

I know want to test my customer connector.

I selected the Test tab and clicked New connection, which prompted me to authenticate to Azure Active Directory.

Once the connection was created, I then clicked on Test Operation.

Everything worked!

Just to recap, in this article I created an Azure Function, secured it with an Azure Active Directory identity provider and created a Customer Connector in Power Platform to access the Azure Function.

As always, please share your thoughts!