What is the difference between NetWare 5 licenses and NetWare 6 licenses?
NetWare® 5 uses the Server Connection License (SCL) model while NetWare 6 uses the User Access License (UAL) model. The SCL model consumes a license unit for every resource consumed in the tree and is concurrent. The UAL model consumes a license unit when a user logs in to the tree and does not consume additional units for resources consumed in the tree.
NetWare 5 and NetWare 6 servers with their associated licenses can coexist in the same eDirectoryTM tree.