Describes how you can silently (without user input) uninstall ActiveSync 3.1, ActiveSync 3.5, and ActiveSync 3.6.

support.microsoft.com/kb/299550

ActiveSync downloads & Windows Mobile synchronization on Windows Mobile Device Center. Use your mobile device to transfer information, settings, and files from you PC.

www.microsoft.com/windowsmobile/en-us/help/synchronize/device-synch.mspx

HKey_Local_Machine\Software\Microsoft\Windows\Current Version\Uninstall\Windows CE ... dialog box is displayed, click Cancel, and then continue reinstalling ActiveSync.

support.microsoft.com/kb/263152

To work around this problem, follow these steps to uninstall ActiveSync 4.0, and then install an earlier version of ActiveSync on the desktop computer: Uninstall ActiveSync 4.0.

support.microsoft.com/kb/902273

In Device Manager, right-click your mobile device, and then click Uninstall. ... Step 3: Reinstall ActiveSync and Your Mobile Device. Restart your computer in Normal mode ...

support.microsoft.com/kb/286325

The Uninstall for ActiveSync 3.7.1 does not support Silent Mode (that is, there is no Silent Uninstall).

www.microsoft.com/thailand/windowsmobile/business/strategy/silentmodesetup.mspx

Exchange ActiveSync lets you synchronize data between your mobile phone and Exchange 2010. You can synchronize e-mail, contacts, calendar information, and tasks.

technet.microsoft.com/en-us/library/bb124915.aspx

I can't even uninstall Activesync 4.2.. same errors. Gets about 3/4 through and then errors ... erro occurred while atempting to read from C:\Windows\Installer\Microsoft Activesync ...

social.microsoft.com/forums/en-US/windowsmobile/thread/fc703bf1-7633-4b0c-8a68-34b9bc4a...

During an uninstall, this rollback document is passed to the Uninstall Configuration ... The ActiveSync uninstall feature, Add or Remove Programs. The Remove Programs item on the ...

msdn.microsoft.com/en-us/library/bb158554.aspx

This device module function synchronizes data between the ActiveSync service provider and the device. Uninstall_Exit. Called after an application is uninstalled.

msdn.microsoft.com/en-us/library/aa909518.aspx