Before your OES 23.4 servers are patched, ensure that you complete the following steps.
If you plan to schedule immediate patching in section Troubleshooting Linux Package Management, perform the steps now.
On any servers that have the ZENworks Agent installed for the first time, check whether the OES 23.4 installation sources are listed in YaST Control Center> Installation Source. If the sources are not listed, add them back before starting the patching.