Old topic but unresolved simply. Just adding my two cents to try and help for all the googlers out there. For those times when your organization has already installed Lync, and you know not from where or how, the following line will remove it:
wmic product where "name like 'Microsoft Lync 2010%%'" call uninstall /nointeractive
This will call the uninstall method that the software told the OS it uses when installed. It will work on virtually all well coded software, whether it uses installshield, MSI, WYSE, etc. The %% is a wildcard that tells the line above to uninstall anything
that starts with "Microsoft Lync 2010." This command WILL uninstall EVERYTHING that matches the string, so be careful. "Microsoft Lync%%" will remove the following:
Microsoft Lync 2010
Microsoft Lync 2010 SDK
Microsoft Lync 2013
This works on Adobe Flash, Acrobat, Weatherbug, IrFranView, and a ton of other software. Microsoft project, however, failed to uninstall this way. An XML Config has to be setup for that.
Unattended, I used the following script to remove Lync 2010 in preparation for a Lync 2013 install:
taskkill /F /IM communicator.exe
taskkill /F /IM lync.exe
wmic product where "name like 'Microsoft Lync%%%%'" call uninstall /nointeractive
REM The following command aborts a restart if one is required from the previous uninstall
c:\windows\system32\shutdown /a
