From the download page:

Novell Open Enterprise Server 2—NetWare includes an evaluation license with
the software to install NetWare as a virtual machine as well as a on a
physical server. This license and its corresponding key file expire after 90
days. Therefore, unless you purchase the OES product and install a new
license during the 90-day period, the system begins generating messages to
remind you to complete your purchase.

Where is the 90-day license located?