WMDC/Activesync has always been a headache for most Windows Mobile users, myself included. Last week I began experiencing sync issues with my palm Treo Pro. My device would connect fine via USB or Bluetooth, start to sync but then it would get stuck trying to sync my Calendar appointments. Since my Outlook was updated and I had good backups of my PST files I went ahead and erased partnerships on both device and PC. No joy. I then decided to sync only Contacts, Tasks, Notes this worked but once I ticked Calendar WMDC appeared to freeze up. I also got an error message saying: An error occurred while syncing to your server blah blah blah, which was really odd because I did not use exchange sync. To make matters a bit more difficult to troubleshoot… The thing was my other device an HTC Touch3G was syncing ok with the same machine. So it was something wrong with the Treo. I did not want to do another hard reset because I had just done one a couple of weeks back. I decided to do a search...