[admin@MikroTik] > ip cloud set ddns-enabled=yes update-time=yes  ddns-update-interval=00:05:00

[admin@MikroTik] > ip cloud print
          ddns-enabled: yes
  ddns-update-interval: 5m
           update-time: yes
        public-address: 203.0.113.254
              dns-name: deadbeef.sn.mynetname.net
                status: updated
               warning: Router is behind a NAT. Remote connection might not work.

Refs