User Configuration > Administrative Templates > Microsoft Office 2016 > Microsoft Office Document Cache
User
HKCU\software\policies\microsoft\office\common\offline\options
This policy setting allows users to save files checked out from SharePoint, or other document management server products, to a local folder when editing the files. By default, checked-out files are stored in the Office Document Cache. The Office Document Cache allows the same offline editing capabilities as a local folder, but automatically syncs the files when there is Internet connectivity. Note: It’s not recommended to enable this policy setting unless needed to support existing document management processes. If you enable this policy setting, users can specify a local folder to save checked-out files to by going to File > Options > Save > Offline editing options. If you disable or don’t configure this policy setting, checked-out files are stored in the Office Document Cache.