As you Azure AD provides the ability to integrate with applications, either published through the marketplace, Azure AD Proxy (to publish internal apps) or by registering your own custom application.
Well, as announced during the online Build 2020 event, the registered application feature has been updated to provide an integration assistant helping you fixing potential integration and configuration problems.
The Integration Assistant analyses your app registration and benchmarks it against a set of recommended security best practices.
You can access the assistant from the registered application blades: logon to your Azure AD portal (https://aad.portal.azure.com/) or Azure portal (https://portal.azure.com/) and reach the Azure Active Directory blade
Then access the App registrations blade to select the registered application you want to use the assistant against
There you will the Integration assistant (preview) option to give access to the assistant analysis results
For each you can easily see if your integration is correct or not; for each issues found you can open the Contextual menu to either directly access the corresponding configuration blade, a link to the documentation (when available) or decide if fact this is not an issue for your application