From what I have read, upgrading from the Open Source Edition to the Network Edition is straightforward. Just downloading the network edition, extracting it, unpacking it, and running install.sh. I have done those steps.
Running install.sh outputs:
I have requested the trial license, but from the documentation I should be able to just install it. I am running on ubuntu 8.04 lts based linux.
Operations logged to /tmp/install.log.10270
Checking for existing installation...
ZCS upgrade from 5.0.14 to 5.0.15 will be performed.
Checking for available license file...
ERROR: The ZCS Network upgrade requires a license to be located in
/opt/zimbra/conf/ZCSLicense.xml or a license previously installed.
The upgrade will not continue without a license.
Your system has not been modified
New customers wanting to purchase or obtain a trial license
should contact Zimbra sales. Contact information for Zimbra is
located at http://www.zimbra.com/about/contact_us.html
Existing customers can obtain an updated license file via the
Zimbra Support page located at http://www.zimbra.com/support.
Any help would greatly be appreciated!