Use long file names whenever possible

Supported on: At least Windows Server 2008 R2 or Windows 7

Registry

HKCU software\policies\microsoft\office\16.0\common\internet

Value name: donotuselongfilenames

Enabled: donotuselongfilenames = 0

Disabled: donotuselongfilenames = 1

Checks/Unchecks the corresponding UI option.