I'm running currently a single Zimbra Open Source Edition Server:

[zimbra@zbr opt]$ zmcontrol -v
Release 6.0.5_GA_2213.RHEL5_64_20100203001950 CentOS5_64 FOSS edition.

I need to migrate this server to the newest Zimbra Network Edition (the new zimbra installation will be on another server not on the same hardware...)

I've read the Wiki entry about Migration at Network Edition Moving from Open Source to Network Edition ZCS - Zimbra :: Wiki

Important: The ZCS release version number you install on the network edition server must be the same release as installed on the open source edition server.
Since the new Network Edition Server will be version 7 and the my current Zimbra Version is 6.x, how do i make a proper migration of the data and users? Is this supported at all?