Cisco FTD 1140 Site to Site tunnel logs

[NetworkPitu]

Hi guys,

we have Cisco FTD 1140 managed by FMC and I created Site to Site tunnel Policy Based to our customer Fortinet FW and there is some issues. Customer sent me a logs about issues in Phase 2 but I cannot find any logs or events for this tunnel or negotiation logs in FMC or even in FTD CLI. Our connection look like that:
Internat subnet -> NAT rule -> S2S Tunnel.

NAT rule is working, I checked it in packet tracer and under NAT option rule is chosen correctly but tunnel won't be established.

I checked VPN -> Troubleshooting tab, Events, Analysis -> Connections->Events tab but there are no logs about negotiation in IKEv2 or IPsec. Where I can find them or how can I fix this tunnel?

[MHM Cisco World]

https://www.cisco.com/c/en/us/support/docs/security/secure-firewall-management-center/220647-implement-platform-settings-for-vpn-trou.html

Check this

Also what is issue between ftd and forti?

MHM