I beleive microsoft has nobbled activesync so that it no longer works without a server certificate. My system worked for 2 years on SBS 2003 with Exchange SP2 and now, since January after an update it doesn't. Has anyone else experienced this.

I'm surprised that it ever worked without a server certificate.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

You must have a server certificate. Preferrably a public certificate with SANs in it for the OWA and autodiscover address. You can test all functionality from: https://www.testexchangeconnectivity.com/ Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com