The server components (extension, platform, and service) are expected to run across the same build version in different appliances.
The upgrade path is:
Upgrade from 1.3.x to 2.3.x
Upgrade from 2.3.x to 3.0.x
Upgrade from 3.0.x to 4.x.x
Note
To upgrade from older TIE versions to TIE 4.6.x, see KB96742.
We recommend that you run the latest and greatest versions of ePO - On-prem, Trellix Agent, and DXL. See KB94079 for details about ePO - On-prem minimum supported extension versions. See Trellix Data Exchange Layer Installation Guide for details about upgrades.
Upgrade paths in a multi-TIE server environment
Given that you have different TIE server instances deployed in your environment, for example, a Primary, a Secondary, and a Reporting Secondary instance, perform a upgrade.
Make sure the Secondary server database replication is up-to-date.
Upgrade the TIE extension.
Always start with the Primary server, then continue with the other server instances you have.