Should you disable it, routerOS will perform only as an NTP client. Good enough if you want to use accurate clock for logging and so on. The units on your own community should really use external stratum 3 or 4 NTP servers just like the pool.ntp.org clusters anyway. I in https://winbox-login73848.blog-ezine.com/35422021/a-simple-key-for-winbox-malaysia-unveiled