Hi Michael, that is the only protocol enty in W3SVC1 if Pocket PC tries to connect by using ActiveSync: 10.10.4.254, hostix\david_mucix.de, 4/22/2005, 15:50:34, W3SVC1, FE01, 10.10.4.1, 312, 662, 261, 200, 0, POST, /Microsoft-Server-ActiveSync, User=david_mucix.de&DeviceId=16323330054189E188000050BF3F5173&DeviceType=PocketPC&Cmd=Notify&Log=V2TNASNC:0A0C0D0FS:0A0C0D0SP:5C5I3283S6288R, I know only W3SVC, HHTPERR, SMTPSVC protocol files on IIS. Is there any other protocol files on system for ActiveSync? Ara our IIS Virtual Directory directory security configurations on FE and BE correct? Best Regards Mustafa