Fortiap 221e Firmware Upgrade Path Link

is still supported, similar models like the square-shaped S221E have reached final versions (6.4.9) and are incompatible with newer FortiOS 7.4.x releases.

Once you reach , you are on a modern partition scheme. From here, the path stabilizes. fortiap 221e firmware upgrade path

, the firmware upgrade path is largely direct, though specific stability issues between certain versions necessitate a staged approach for some users. While general Fortinet guidance often suggests that FortiAPs can be directly upgraded to the required version, the FortiAP Supported Upgrade Paths documentation specifies intermediate steps for older builds. As of early 2026, the FortiAP 221E supports versions up to 7.4.3 . From 6.4.x to 7.4.3 : 6.4.4 - 6.4.9 →right arrow 7.0.3 →right arrow 7.2.2 →right arrow 7.4.3 . From 7.0.x to 7.4.3 : 7.0.0 - 7.0.1 →right arrow 7.0.3 →right arrow 7.2.2 →right arrow 7.4.3 . 7.0.3 - 7.0.7 →right arrow 7.2.2 →right arrow 7.4.3 . From 7.2.x to 7.4.3 : 7.2.0 - 7.2.1 →right arrow 7.2.2 →right arrow 7.4.3 . 7.2.2+ can generally go directly to 7.4.3 . Critical Technical Warnings is still supported, similar models like the square-shaped