Registry keys related to offline files are explained below.
DatabaseLocation
DatabaseLocation is offline files related registry parameter and it exists under the following node.
HKLM\Software\\Microsoft\Windows\CurrentVersion\NetCache
This key contains the path of the folder where information about offline files is stored. Note that with the default settings you will not see the above key in the registry. By default offline filesdata is stored in C:\WINDOWS\CSC. If some one wants to change this, then they can create this key and assign it the path of the new location. As this is system wide setting only administrators can set this registry key.
FormatDatabase
See FormatDatabase registry key
EncryptCache
Encrypt registry key controls the encryption of offline files cache. If it set, cached files will be encrypted. It resides under the following nodes in the registry database.
HKLM\Software\Microsoft\Windows\CurrentVersion\NetCache
HKCU\Software\Microsoft\Windows\CurrentVersion\NetCache
The first one is a machine based setting whereas the second one is a user based setting.
AlwaysPinSubFolders
We can find this key under HKLM\SOFTWARE\Policies\Microsoft\Windows\NetCache and also in HKCU\SOFTWARE\Policies\Microsoft\Windows\NetCache
If this key is set, when a folder is pinned for offline availability all its subfolders are also pinned for offline availability.