This is a known issue affecting vCenter Update Manager 6.0 Update 2.
To workaround this issue, disable Lockdown mode on the ESXi 6.0 hosts prior to patching. Once lockdown mode has been disabled, re-scan the ESXi hosts and update the hosts to 6.0 Update 2. After the ESXi hosts have been remediated, re-enable Lockdown mode. For more information, see
Enabling or disabling Lockdown mode on an ESXi host (1008077).
Note: With Lockdown mode enabled, both strict and normal, the ESXi 6.0 Update 2 hosts will continue to report as Non-Compliant. Disabling Lockdown mode will allow for a successful Compliant status.