My Windows Mobile 5 based Cingular 3125 cellphone stopped syncing with Vista desktop quite some time ago. Synchronization error stated "ActiveSync encountered a problem on the desktop", which is weird since Vista has replaced ActiveSync with Sync Center and Windows Mobile Device Center (WMDC). Checking error log on the device yielded reference to "Support Code 0x85010014", but no information on how to contact support.
Quick brute force "google & fix" approach didn't work, so it was until now that I found time to find the solution. As many articles on Internet point out, Support Code 0x85010014 problem is related to syncing with Microsoft Office Outlook. In my case it was Outlook 2007 running on Windows Vista Ultimate Edition.
Despite legions of people experiencing this problem, it was surprisingly hard to find the workaround. The fix (first mentioned here) turned out to be simple: repair Microsoft Office installation by going to Control Panel -> Programs And Feature, selecting Microsoft Office 2007 and then clicking Change button on the toolbar.