Policy
Subfolders always available offline
Makes subfolders available offline whenever their parent folder is made available offline. This setting automatically extends the "make available offline" setting to all new and existing subfolders of a folder. Users do not have the option of excluding subfolders. If you enable this setting, when you make a folder available offline, all folders within that folder are also made available offline. Also, new folders that you create within a folder that is available offline are made available offline when the parent folder is synchronized. If you disable this setting or do not configure it, the system asks users whether they want subfolders to be made available offline when they make a parent folder available offline.
646dc3e8412cPol_AlwaysPinSubFoldersRegistry
Copy registry mappings
HKLM\Software\Policies\Microsoft\Windows\NetCache\AlwaysPinSubFolders (enabled) = 1
HKLM\Software\Policies\Microsoft\Windows\NetCache\AlwaysPinSubFolders (disabled) = 0Policy notes
Makes subfolders available offline whenever their parent folder is made available offline. This setting automatically extends the "make available offline" setting to all new and existing subfolders of a folder. Users do not have the option of excluding subfolders. If you enable this setting, when you make a folder available offline, all folders within that folder are also made available offline. Also, new folders that you create within a folder that is available offline are made available offline when the parent folder is synchronized. If you disable this setting or do not configure it, the system asks users whether they want subfolders to be made available offline when they make a parent folder available offline.