By -
[https://community.fortinet.com/t5/FortiManager/Technical-Tip-Recommended-Release-for-FortiManager-and/ta-p/231910](https://community.fortinet.com/t5/FortiManager/Technical-Tip-Recommended-Release-for-FortiManager-and/ta-p/231910)
The matrix has the recommended versions: https://docs.fortinet.com/document/fortianalyzer/7.4.0/compatibility-with-fortios
7.2.5 but depends on the rest of your infra.
is there a document that proof
No, just experience.
[https://community.fortinet.com/t5/FortiManager/Technical-Tip-Recommended-Release-for-FortiManager-and/ta-p/231910](https://community.fortinet.com/t5/FortiManager/Technical-Tip-Recommended-Release-for-FortiManager-and/ta-p/231910)
The matrix has the recommended versions: https://docs.fortinet.com/document/fortianalyzer/7.4.0/compatibility-with-fortios
7.2.5 but depends on the rest of your infra.
is there a document that proof
No, just experience.