The small business I'm working for is looking to upgrade their Zimbra server from 5.0.16 to 7.1.4. At the same time the server's Linux flavor will be changing from CentOS 5.2 to Debian Breezy.
Release 5.0.16_GA_2921.RHEL5_20090429052155 CentOS5 FOSS edition
In broad terms how should I best approach this upgrade? Should I do a number of incremental upgrades or should I jump directly from 5.0.16 to 7.1.4?
What tools / techniques should I employ.
The new Debian server will be virtual so I have the opportunity to test the upgrade cycle.
Your help will be greatly appreciated.