i need a suggestion
i would archive inactive accounts; i cannot delete them without loosing their emails, i cannot disable them without wasting license slots.
One solution can be to setup an opensource zimbra and put there these older accounts.
Of course the domains must be the same in the 2 servers, so i think to put OS Zimbra inside intranet.
Only admin should access this Zimbra OS with older accounts.

How can migrate accounts between them? can i backup these accounts and restore them without issues?