Hi, we have a single server installation (with a single domain) running MacOSX Server 10.4 with Zimbra 6.0.10_GA_2692.MACOSXx86 Network Edition and we must migrate on a new server Linux with Ubuntu 10.04 LTS. We wish at the same time upgrading to current 7.1.3 Zimbra release. What steps must be followed so that all go wrong? Thank you for your help.