Setup: 2 DirectAdmin servers with Multi Server DNS
Problem: DNS Zones between the 2 servers are not in sync
Solution: Log in to the source server from which you want to sync zones with the other server and execute the following command:
echo "action=rewrite&value=named" >> /usr/local/directadmin/data/task.queue
Wait a few minutes and the DNS zones from the source will be synced with the other server.