Azure Resource: https://portal.azure.com/#@034gc.onmicrosoft.com/resource/subscriptions/fde9cf97-7bf0-4373-9fbd-eba18c6e0dfc/resourceGroups/TC-DevTest-CivAv-RGP/providers/Microsoft.ApiManagement/service/civav-dev-apim/overview

Open

For Azure AD, we need to configure the option Manually configure identity providers (for example, Azure AD B2C) to use the correct app registration

Open

The Redirect URL need to be added on your app registration.

Developer Portail (example)

Home - Microsoft Azure API Management - developer portal (azure-api.net)