Unable able grant permissions to users because users are not signed in on service with correct permissions.
- Log in to your machine using Admin rights.
Note: Windows allows services to be run except for the Local System.
- Go to Control Panel > Administrative Tools > Services window.
- Open the Properties of the Serv-U FTP Server service.
- Change the user account in the Log On.
- Select This account.
Note: The account used should be an administrative account that exists on the domain (the local Administrator account does not work here. Use either the domain-wide administrative account or a named account).
For more information, see Remote Folder Access With Serv-U Running as a Service.