Problems with IPSec - only one device can connect

I just created another thread in here. I’ve shared the configuration that works for me: http://forum.mikrotik.com/t/windows-10-unable-to-connect-to-ipsec-ike2-vpn/146871/1

On the other hand, I’ve written few guides there and there, so you can take a look too:
http://forum.mikrotik.com/t/mikrotik-behind-nat-to-mikrotik-ipsec-ike2-with-certs-tunnel-eoip/144952/1
http://forum.mikrotik.com/t/nordvpn-ipsec-ikev2-killswitch-for-ros6/144817/1

IPSEC/IKE2 is a bit “overcomplicated for newbies” protocol, but once you get used to it it starts to make sense. This is how to get started:

  1. Enable logs in Mikrotik router for “ipsec” topic. It’s configurable in “/system logging”.
  2. Start connecting to VPN server from any device.
  3. Check logs to see what’s happening.

I suggest you to share logs from both client and server.