Cisco WebEx Meetings is installed on systems, but is not being detected. I reviewed the Applicability Rules for Cisco WebEx Meetings 41.2.4.15 and believe the issue is a difference between x86 and x64 registry locations.
Applicability rule registry path: HKEY_LOCAL_MACHINE\SOFTWARE\Webex
Registry path for (some) systems in our environment: HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Webex