ESXI patch remediation fails with error " The Operation is not supported on the selected Inventory Objects"

Symptom :

Updating ESXI host ptach fails with the error
" The Operation is not supported on the selected inventory objects. Check the events for the objects selected for the operation."

Root cause: 

This error is due to the admission control policy restrictions set in the HA preventing the update manager from doing its job.

Workaround:
There are two options to resolve this issue

 Disable HA : (option 1)

1. Right click the ESXI cluster and click edit settings

2. Under cluster features , select Turn off Vmware HA

3. Click ok

 Disable Admission control : (option 2 )

1.Right Click the cluster and click edit settings

2. Under cluster features Click VMware HA

3.Under admission control, select “disable: power on vms that violate the availability constraints” and click ok


Note: Don’t forget to enable the options back once patching is completed.