I'm trying to delete an Active Directory (not default) in Azure. It said I need to Delete all App registrations. When I click on the link, there is no registered app.
Interesting is dashboard said I have 1 app registered. When I click on the link, there is no app either.
As the user is deleted or disabled in Azure AD, all their tokens are revoked. So they can't access any resources. Deleted or disabled users who didn't sign in previously can't access a device. There's no cached username and password enabled for them.
Search and select the Azure Active Directory. Under Manage, select App registrations and select the application that you want to configure. Once you've selected the app, you'll see the application's Overview page. From the Overview page, select Delete.
In the Azure portal, search for and select Azure AD Domain Services. Select the name of your managed domain, such as aaddscontoso.com. On the Overview page, select Delete. To confirm the deletion, type the domain name of the managed domain again, then select Delete.
I faced similar situation today and got to this post.
I have found solution accidentally by following one of the MSDN article. This article is about adding new application and that's how I got to understand how to find all registered applications.
Basically, this happened because there are two places where application registrations are shown.
One
Under "Azure Active Directory" -> "App Registrations".
Second
Under left navigation -> "All Services" -> Search for "Azure AD B2C" -> click on it -> Open.
Then you will be able to see "Applications".
Here all your application which are using your Azure B2C instance are listed. You will have to delete them.
Once they are deleted, you can again go to "Delete Directory" option and all your checks / pre requisites should be successful.
This helped me to resolve exact same issue and hoping that this should also help you.
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