The LogonServer property contains the name of the server to which logon requests are sent. Server names should be preceded ...

The LogonServer property contains the name of the server to which logon requests are sent.  Server names should be preceded by two backslashes (\\\\). A server name with an asterisk (\\\\*) indicates that the logon request can be handled by any logon server. A null string indicates that requests are sent to the domain controller. 
Example: \\\\MyServer