I am trying to synchronize my mailcow server (MX1-Online, with a public fixed IP), with its replica (MX1-Offline) behind the NAT, with no public IP. The replica is actually a restore of the MX1-Online vm, so it has exactly the same DB setup and passwords.
I can already achieve a replica of all mails + imap folders, by synching /var/lib/docker/volumes/mailcowdockerized_vmail-vol-1
What folder should I synchronize to also replicate all Calendar events + Address books ?
Would synchronizing everything inside /var/lib/docker/volumes work, or would it rather just screw up everything?