This other thread tells how to resync servers that are out of sync: https://forum.howtoforge.com/threads/force-dns-propagation.85983/ On checking status at mxtoolbox.com, I saw my secondary DNS had a different serial number. I went to Tools > Resync to resync everything, and hundreds of transactions were processed. So my question is, can we run a report to know if a resync is warranted between the primary and any secondaries? The Tools > Resync page has dropdowns for each feature. But only the primary server is listed for all lists. That makes me think the selector is just for the "sync from" host, and all other servers will be "synced to". Is that correct? Or ... is my secondary just not showing in those lists for some reason? Can it hurt to occasionally sync just as a matter of policy, just in case there is a sync issue? Can we do the sync with a cron job? Or better stated, is there a CLI command that can be executed to do this sync? Thanks!