We are using Zimbra Collaboration Suite 6.0.8 GA on Ubuntu 6.04, and are planning to go to ZCS 7 on Ubuntu 10.4. No new server, though might go to 64 bits version. Since I am new to Zimbra, please bear with me.
There seem to be quite a few threads on this, but they do not seem to answer one question for me, so one more thread on Upgrade.
It seems from the discussions that the best way to go would be to upgrade to Ubuntu 10.4, download and install ZCS 7 for Ubuntu 10.4. And then......
1. Though the OS can be upgraded, can ZCS be upgraded? Will just installing ZCS 7 on top of ZCS 6 upgrade everything, keeping all the configurations intact? Is there something in ZCS that we can use to upgrade it?
2. Will it be better to build another server with the new OS and ZCS, import all user data and all configuration to ZCS 7? Is importing data even possible?
3. What will be the most convenient way to upgrade, with fail safe route, with minimal down time?
Basically, how do I go about upgrading and re-configuring it so that the end users will have no issues, and will have all their emails and everything, and just have additional features that ZCS 7 has.
Because of different flavors of ZCS on the download page for different versions of OS, I am getting a feeling of chicken and egg...
Any pointers would be appreciated...