Yor problem has nothing to do with the mapped drives or PDMWorks. I have configured PDMWorks Vaults on many Windows machines as well as a Novell Server. The requirements for PDMWorks are that the license server is a Windows machine that requires a computer name or more specifically a UNC unified naming convention ie the server name: //Server1 The UNC is required because the service that runs the PDMWorks Application starts up before the mapping of drives on the license server. The server name must be incorrect or else. Update your PDMWorks client software on the machine1 to point to a vault location for the machine2 UNC and it will use the server permissions to address the vault through the PDMWorks application service not the mapping of drives.