Letsencrypt issue

Ah, the command is ee site update example.com --letsencrypt=off

Note that you need to point your DNS to the old server first, make sure it propagates, then run the above.

After which you then change the DNS to point to the new server, make sure the DNS propagates, and install Let's Encrypt there (with the ee site update example.com --letsencrypt command).

Source: https://easyengine.io/tutorials/nginx/letsencrypt/