Thank you very much Phoenix, I found some document at Moving ZCS to Another Server » Zimbra :: Blog
Please confirm it is correct for my issue.
__________________
Zimbra 5.0.19 on Dell R710| Ubuntu 8.04 x86_64, 8 GB. RAM, Dual Quad Xeon, 4X146 GB. SAS.
Zimbra install as Multi Server MTA. & LDAP.+Mailbox server |