Mapping a drive means that you’re going to make a specific drive available to other users connected to a common network. 

Mapping network drives, as well as troubleshooting network drives, are network related activities and as such are required be performed by your Network Administrator.  Mapped drives that go 'missing' can be a sign of a larger network issue.

Here are some helpful resources:

Map a network drive in Windows 10 - Microsoft

Mapped drive is disconnected - Microsoft

Troubleshooting Mapped drives - Microsoft Q&A

Shared Folder - full permissions access - Microsoft Q&A

If your log in screen does not display your company data directory, please check your computer has access to the Windward mapped drive. This is typically (W:). If you do not have access. please contact your network administrator.