We have a network shared folder to store pdf files. There are several viewer softwares being used. The problem is when someone has a pdf open, others cannot manipulate it. All it says is someone has it open. It does not tell us who. We send a nroadcast email to close the file. It happens too often to call i.t. every time. Is there a utility that can be installed as a service on the server and client, to allow clients to see who has files open on the shared folder?