thanks @JimmyPhelan for your reply. your suggestion of Site to Site VPN is the more appropriate one as the 2 organizations have existing networks and cant merge (for political and security reasons) I read the link you shared, I didnt get the below point: "This process would need to be repeated for each remote/local MX pair as desired. The image below shows an example of an MX to MX VPN connection when the devices are in different Organizations" So if there's one site (added to "organization A" for Auto-VPN), we would need to add the public IP of that particular site in "Organization B" Third Party VPN peer? and in this case, "Orgnzation A" other sites will be able to reach "organization B" sites?
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