https://wiki.zimbra.com/wiki/LDAP_Multi_Master_Replication
http://www.zimbra.com/docs/os/4.5.10/multi_server_install/multi-server_install.5.1.html
http://wiki.zimbra.com/wiki/Network_Edition:_Moving_from_32-bit_to_64-bit_Server
Kompletni migrace na jiný server a upgrade na 8. (toto funguje)
http://blog.spanger.org/?p=1168
http://blog.iservery.com/2014/04/01/kopie-clanku/
oprava LDAP DB
https://wiki.zimbra.com/wiki/Ajcody-LDAP-Topics
zmena jmen a mazani serveru