Backward-compatible policies allow you to use the new Trellix DLP extension format with older Trellix DLP Endpoint client and Trellix DLP Discover server versions, providing large enterprises with an orderly upgrade path.
Backward compatibility can be applied in two modes:
Non-strict mode — Compatibility errors in the policy display a warning. An administrator with policy administration permissions can apply the policy.
Strict mode — Policies with errors can't be applied to the ePO - On-prem database.
When a policy with backward compatibility errors is applied to the database, the errors are displayed on the DLP Policy → Policy Validation page.
Trellix DLP Network Prevent can use policies with warnings created in non-strict mode. When backward compatibility is applied in strict mode, policies with errors can't be applied to the ePO - On-prem database, and therefore aren't detected by Trellix DLP Network Prevent.