As Cisco jabber released a new version to fix some security vulnerabilities, I had a opportunity to mass update the existing jabber versions. Below is tested script that I used to successfully deploy the Jabber 12.9.1 version to all Windows endpoints. You can edit this as needed and deploy Jabber 12.9.1. My script basically removed existing Jabber 12.8.1 and 12.6.2 and install latest 12.9.1.
REM Uninstall Jabber 12.8.1
“msiexec.exe” /x {6E87407E-2EFD-4C7F-B167-8219279226E6} /qn /norestart
REM Uninstall Jabber 12.6.2
“msiexec.exe” /x {BEFF5578-DB83-4AFA-8C40-4A005F2A3BF9} /qn /norestart
REM Delete regkey Jabber 12.6.2
reg delete “HKEY_CLASSES_ROOT\Installer\Products\8855248850B85EC4787609E82C36C6B2” /f
REM Delete regkey Jabber 12.8.1
reg delete “HKEY_CLASSES_ROOT\Installer\Products\7D843DE4BA2A2DC4C89F532E22C06EC9” /f
REM Install Jabber 12.9.1
msiexec.exe /i \share location\CiscoJabberSetup.msi /qn CLEAR=1