http://archives.neohapsis.com/archives/fulldisclosure/2004-02/0321.html This *may* be a regression in the MS04-001 fix. Just to be safe, diable your H.323 functionality until further notice. Jim Harrison MCP(NT4, W2K), A+, Network+, PCG http://isaserver.org/Jim_Harrison/ http://isatools.org Read the help / books / articles!