No. Zimbra Standard or Professional licenses cannot be installed on an existing Zimbra Open Source server. The Zimbra Open Source must be upgraded to the Zimbra Network Edition software. All mailboxes, directory and data is preserved during the upgrade.
Yes, you can purchase mixed licenses of any combination. The minimum purchase units is 25 mailboxes for each type of license.
Yes, you can purchase a Zimbra license subscription for 1, 2 or 3 years. You can also purchase a perpetual license for Zimbra which is significantly cheaper should you plan on using Zimbra for 2+ years.
Yes, you can if you are not using the Zimbra Appliance Edition. The web server and Zimbra server ports (namely Port 80 and 443) must be configured to not conflict. This can be done by assigning multiple addresses to the server, allocating one IP to Zimbra and the other to the web server. Or by allocating Zimbra to respond to HTTPS (Port 443) only and the web server to just HTTP (Port 80).
Yes, you can run multiple domain names on your Zimbra server and this does not cost more. Zimbra is licensed on a per mailbox basis. So you can have multiple domains delivering email to the same mailbox and the mailbox can have multiple email addresses which email is sent from. For example: email@example.com firstname.lastname@example.org email@example.com firstname.lastname@example.org email@example.com firstname.lastname@example.org email@example.com Can be configured to ALL deliver to Fred’s mailbox Fred can then send from any of the fred@example[1 .. 5].com or bob@ or sam@ domains.
No, the Zimbra Appliance is intended only to run Zimbra.
Not natively since Zimbra requires a Linux or *nix based operating system. However, you can run Zimbra just fine within a Virtual Machine on top of a Windows server host.
Yes! You just need to download the correct Zimbra Open Source installation software, www.zimbra.com/downloads/os-downloads.html and then perform the installation on your existing Zimbra server.
Yes, when you purchase Zimbra a new license key will be emailed to you. Just install the new license key and you are right to go! No software re-installation required, data remains intact.
Yes! You just need to download the correct Zimbra Network Edition installation software, www.zimbra.com/downloads/ne-downloads.html and then perform the installation on your existing Zimbra server.