3.2.5.4 Unspecified Redirection
If the protocol does not specify redirection for a particular user profile folder, or if it does specify redirection but sets the flag Redirection Not Specified, the client-side plug-in MUST configure the folder redirection subsystem to allow the user to explicitly redirect that user profile folder. Otherwise, if a policy with the Redirection Not Specified flag not set is provided, the folder redirection subsystem MUST prevent the user from explicitly redirecting that user profile folder.