Here are some things to note about Server Sync / Failover

• Server Sync only syncs the live site data.  Existing backup files stored on the server, backup schedules and crons are not synced.
• Server Sync will not sync custom nginx configuration files in the /etc/nginx/userconfigs folder.
• Server Sync will not sync changes to php.ini
• The destination server must allow root access.  Thus, AWS servers that uses the “ubuntu” user instead of “root” will not work as a  destination or source server; neither will Azure, Alibaba or Google Servers.
• Server Sync is useful for sites that are primarily ‘brochure’ sites.  You should not sync servers with e-Commerce sites, especially those with subscriptions.  Otherwise you’re likely to end up with duplicate orders and charges for your customers.