The ESS Data Path in the registry indicates which ESSSync.vdb4 file is accessed when synchronising data for Mobility or Sage Self Service.
By default the ESS Data Path should the the same as the system folder, as accesed from the local computer (e.g if it is mapped with a v: drive, the mapping must reflect the same as indicated on System Location under Support Help)
No UNC location should be defined if accessing via mapped drive (e.g \\server\vip)
If the user is accessing the system over a network with mapped drives, all mappings for all users must be the same (otherwise syncing will be turned off when accessing the system)