Do not allow drive redirection

This policy setting specifies whether to prevent the mapping of client drives in a Remote Desktop Services session (drive redirection).

By default, an RD Session Host server maps client drives automatically upon connection. Mapped drives appear in the session folder tree in File Explorer or Computer in the format on . You can use this policy setting to override this behavior.

If you enable this policy setting, client drive redirection is not allowed in Remote Desktop Services sessions, and Clipboard file copy redirection is not allowed on computers running Windows Server 2003, Windows 8, and Windows XP.

If you disable this policy setting, client drive redirection is always allowed. In addition, Clipboard file copy redirection is always allowed if Clipboard redirection is allowed.

If you do not configure this policy setting, client drive redirection and Clipboard file copy redirection are not specified at the Group Policy level.

Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
Registry HiveHKEY_LOCAL_MACHINE
Registry PathSOFTWARE\Policies\Microsoft\Windows NT\Terminal Services
Value NamefDisableCdm
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

terminalserver.admx

Administrative Templates (Computers)

Administrative Templates (Users)