A simple question:

I have a multiserver deployment of ZCS NE 7.1.4 with:

1 mailbox
1 ldap + 1 ldap repica
1 mta
1 imap proxy
1 web proxy

My question is:

Does the mailbox backups all the data in a single centralized backup file? Or are the Zimbra backups done independently in each server?

Thanks in advance.