This is a great troubleshooting guide by Chris De Herrera .

This has to be the most common problem that I deal with and luckily there is an easy fix. I regularly have users coming to me who connect their device to Windows XP. Their devices are charging and the USB ports all look okay, but ActiveSync fails to initiate and cannot be made to connect. I have found...

I get this with XP on any device, but only when i've just installed activesync and not done the recommended restart. Asi hate restarting, when im working on a new computer i always hit this one. It works eventually but just freezes the whole machine. This would lead me to believe that maybe you guys...

This is a great troubleshooting guide from ModernNomads.

I know that some users have reported receiving a message like "ActiveSync cannot connect to the Windows Mobile powered device" after connecting with a USB cable. The ActiveSync icon lights up in the system tray and spins a bit before showing the error message. If this is the case, users should...