We're looking at Zimbra to possibly replace our postfix/cyrus setup to add collaboration capabilities. We'd also need to sync cals and contacts with outlook, so we'd need Network Edition.

I was looking at the requirements document and it listed _only_ RH Enterprise for Network Edition. Is it the only option ? Is it regarding support or is it a technical issue (beyond Network Edition not coming with a LDAP package from what we can see so far). Can we do Network Ed on Fedora Core?

We're building the business case, comparing all costs between going for Exchange or for Zimbra.. Of course RHES is a cost to consider.

Thanks !