You need to create and enable a new predefined DHCP Option 100 named "ZENworks" at each DHCP server you will be using in the network environment. The DHCP server sends this option with a configured string value you supply (the local Middle Tier Server address or DNS name) to the agent each time a workstation running in the subnet boots and requests an IP address.
NOTE: When you create the new DHCP option (on either NetWare or Windows servers), make sure that you set the data value as string. For more information, see TID 10092121 in the Novell Knowledgebase.