2.2.2 EFS Enabled Status
Key: Software\Policies\Microsoft\Windows NT\CurrentVersion\EFS
Size: Equal to size of the Data field.
Data: 0x00000000 (to enable EFS on the client) or 0x00000001 (to disable EFS on the client).
This option SHOULD<2> be supported by implementations of the Group Policy: Encrypting File System Extension. If an implementation chooses not to support this option, the administrative plug-in MUST NOT modify the Registry Policy entry described earlier.
If the client supports this option but the option is not present, the client SHOULD use a default value of 0x00000000.