Trellix will discontinue support for legacy Trellix Agent (TA) versions prior to 5.x in upcoming releases of Trellix ePolicy Orchestrator (ePO) on-prem.
Important: TA versions prior to 5.x have already reached End of Life (EOL). TA 4.8—the final release in the 4.x series—reached EOL in 2018 (for details, see the Knowledge article How to manually remove Trellix Agent 5.x). These legacy Agent versions will no longer function once the upcoming ePO updates are implemented.
Anticipated rollout
This change is planned for inclusion in an upcoming ePO on-prem release, targeted for Q2 or latest by Q3 2026.
Recommended action
Customers are highly recommended to upgrade to TA 5.x, ideally the most current supported version, to ensure continued compatibility and support. For details, see the Knowledge article Supported platforms for Trellix Agent 5.x.
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