question: public static boolean useMSInterop ( ) { String propValue = AccessController . doPrivileged ( new GetPropertyAction ( "sun.security.spnego.msinterop" , "true" ) ) ; return ( ! propValue . equalsIgnoreCase ( "false" ) ) ; }
target:  Determines the SPNEGO interoperability mode with Microsoft; by default it is set to true. To disable it, the application indicates this by explicitly setting the system property sun.security.spnego.interop to false.