FortiAP / Fortigate Firmware updates

You may want to check the Firmware version compatibility matrix.

https://docs.fortinet.com/document/fortiswitch/7.4.1/fortilink-compatibility

https://docs.fortinet.com/document/fortiap/7.4.0/fortiap-and-fortios-compatibility-matrix/495193/fortiap-and-fortios-7-x-compatibility-matrix

As long as they're compatible, I don't think it matter which one you do first.

It's better if FGT upgraded first to the version that is still compatible with the current FSW/FAP version. Then you can plan further from that.

Hi @Aubrey_MT 

Just to add on slightly on top of @darisandy statement, please check the security fabric upgrade order listed in the administrative guide:

https://docs.fortinet.com/document/fortigate/7.4.1/fortios-release-notes/936594/fortinet-security-fabric-upgrade

Please upgrade FortiGate first and proceed with FortiSwitch and then FortiAP as it maintains network connectivity without the need to use manual steps.

Hello,

besides of FortiAP and if you use FortiLink with your switches, have a look into the "Compatibility Matrix".
https://docs.fortinet.com/document/fortiswitch/7.4.1/fortilink-compatibility

There are recommended "R" Versions for your FortiOS.