How to remove users Access Management from Top level
First, make user you have full access in azure,
Then go to Azure AD, then to Properties
Change from No to Yes
When this is done, you can run this PowerShell command
Remove-AzRoleAssignment -SignInName email@example.com -RoleDefinitionName "User Access Administrator" -Scope "/"
This will remove the user’s access from the top level.
Make sure your user account change back your access right.