Table of Contents
Rudder agent 3.1.x and 3.2.x are compatible with Rudder server 4.0.x, but they do not support the new "Audit" policy mode. It is therefore not strictly necessary to update your agents to 4.0.x, unless you want to be able to use the "Audit" policy mode.
These agents are not compatible with Rudder 4.0, and you have to upgrade them. Be careful to follow the upgrade path explained above.