The Upgrade Compatibility Tool is a mandatory part of the ePO upgrade process. It confirms that only compatible extensions are present immediately before an ePO upgrade. The tool depends on the up-to-date information listed in
ProductCompatibilityList.xml. This information is both bundled with the tool itself and also kept up-to-date and hosted by Trellix at
ProductCompatibilityList.xml.
The Upgrade Compatibility Tool uses the version bundled within the installer. This version is likely to be older and contains outdated information.
This mismatch can be seen when you compare the hosted version in the following scenarios:
- When the ePO Server is air-gapped
- When the ePO Server doesn't have outside access to the internet
- When the ePO Server doesn't have outside access to the file linked above
If the outdated
ProductCompatibilityList.xml doesn't block a specific incompatible extension on the targeted ePO version, the upgrade is allowed to continue.
This design results in a disabled extension when the upgrade completes. When trying to update the disabled extensions, it fails when the extensions are installed in a bundle. This failure is because the extension compatibility logic looks at dependencies against the ones that are currently installed.
