An Install Readiness Check in Symantec Installation Manager (SIM) indicates Open XML 2.0 is required for IT Analytics and provides a broken link to a Microsoft site to download the software.
ITMS 8.x
Symantec Installation Manager (SIM)
This warning message can be ignored as OpenXML is not required for any version of IT Analytics, nor is it used by the Symantec Management Platform or any of its solutions.
The OpenXML install readiness check has been removed from ITMS 8.6 (8.6.2036) and all future releases.