Yes, you can easily upgrade from Zimbra Open Source to Zimbra Standard or Professional Edition. Downgrades from Zimbra Standard or Professional to Zimbra Open Source work too!
No, the upgrade process requires downtime for the Zimbra server.
Yes, please contact us to arrange a 1 on 1 on-line demonstration. Agileware also have a collection of videos demonstrating Zimbra features.
Please see system requirements for a single Zimbra server installation and for a multiple Zimbra server installation. For a basic system, Agileware recommends minimum of 8GB RAM (ideal 16GB RAM), Intel x64 3GHz+ CPU, 2x300GB+ fast hard disks (SCSI, SSD, SAS 10K RPM) in a RAID configuration of RAID0, RAID1 or RAID10. RAID5 is not recommended due to poor write performance. When choosing disks for your server please read this section on Zimbra disk recommendations. Hardware requirements will increase based on load, type of usage and other software running on the system. We recommend software or hardware RAID for email systems and a daily backup regime. Recommended reading, Performance Tuning Guidelines for Large Deployments and Performance Tuning Guidelines for Single-Server 100-500 User Systems
Yes you can use the server for other functions. Zimbra installs all the necessary software required to function and so there will be Port conflicts between such common applications as LDAP, web and email services if they are already on the server. The solution in this case is to have the services run on either unique ports or bind to different IP addresses.
A Instant Messaging client is available in the Zimbra Webmail client as well as Zimbra Desktop. Zimbra Instant Messaging uses the Jabber protocol so any Instant Messaging client that supports Jabber can be used.
No, all you need is a modern Web Browser: Fire Fox 3+, Microsoft Internet Explorer 7+, Apple Safari, Google Chrome are all supported.
No, the Zimbra webmail client will automatically prompt users to reload their Zimbra webmail after an upgrade.
No. But Agileware have a custom backup solution available as part of our Zimbra Administration Service.
Zimbra backups are performed LIVE, the server remains operational and accessible, this is a unique feature of Zimbra Network Edition. Zimbra Open Source Edition does not have the same backup/restore feature. The Zimbra full backup process places the account’s mailbox in maintenance mode to temporarily block mail delivery and user access to that mailbox. and Returns that account’s mailbox to active mode and moves on to the next one. For more details see the Zimbra Administration Guide.