it says sign in as any user that can remove elevated access, not necessarily the user who initially added that account :)
- Sign in as a user that can remove elevated access. This can be the same user that was used to elevate access or another Global Administrator with elevated access at root scope.
- Use the Remove-AzRoleAssignment command to remove the User Access Administrator role assignment. Azure PowerShellCopy
- Remove-AzRoleAssignment -SignInName username@example.com -RoleDefinitionName "User Access Administrator" -Scope "/"