After ZENworks Appliance configuration, the security updates (product and operating system patches) could not be applied as users were unable to register to Micro Focus Customer Center (MFCC) server or a Local Subscription Management Tool (SMT) server.
To resolve this issue, apply the ZENworks 23.4 - FTF 94 or later and retry to register on the Online Update page. For steps to apply the ZENworks 23.4 - FTF 94, see Official Primary Server FTF 94 on ZENworks 23.4.