I'm running Exchange 2003 and have a problem with excessive logons. The users with 30+ logons are getting denied access to the exchange server. It looks like this is only occuring for users with weak wireless signals. As thier wireless signal drops and reconnects, it opens another session on the exchange server. The server is not "clearing" the old connections. I'm having to restart the server to clear the connections. Any ideas???

I had this exact same issue and the following fixed it for me: 948496 An update to turn off default SNP features is available for Windows Server 2003-based and Small Business Server 2003-based computers http://support.microsoft.com/default.aspx?scid=kb;EN-US;948496 324270 How to harden the TCP/IP stack against denial of service attacks in Windows Server 2003 http://support.microsoft.com/default.aspx?scid=kb;EN-US;324270