Migration of login from Windows Live to Azure

I recently found out that Windows Live will no longer be supported in the future and that new apps can no longer be created there.
go.microsoft.com/fwlink/?linkid=2149315

If I create a new app for login through Azure, will those users who used Windows Live be migrated to the Azure app or not?
Is there mutual integration between these login systems or will this be a completely new application and all old Windows Live users will be lost?

I have not found information anywhere about the migration of old users, everywhere there is only information that Windows Live will no longer be supported.