I ended up using the script atto migrate.

It doesn't look like Carbonio has any mechanism for updating these certificates, so I used a script at: to install them for me.

Where in the manual? I've found how to add certificates for virtual hosts, but not for the root system itself.

Modify the script instep 4 to: #!/bin/bash #Script for creating the email accounts createacct.sh USERS="/opt/backups/zmigrate/emails.txt" for...

I reinstalled it as a VM instead of an LXC container and it worked.

Ohhhhhhhh, well... That's a problem.

Updated and rebooted. Better, but still some errors. zextras@webmail:~$ zmcontrol -v && zmcontrol status Carbonio Release 24.12.1 Host web...

Well, something certainly isn't running. Let me look into that first. zextras@webmail:~$ zmcontrol -v && zmcontrol status Carbonio Release ...