updating the management password for a couple of ESXi hosts in VxRail Appliance

Hi Guys,
I am having difficulty updating the management password for a couple of ESXi hosts in VxRail Appliance. and these are appliances are reporting "This host is missing. The following data is from cached information and may no longer be accurate. " from health Monitoring page.
Followed the below article in updating the password, however once the curl command is run, the status shows OK for few Minutes before becoming INVALID again. -- Dell Article 61400

I have tried restarting the PTAs and verified the communication is OK. even rebooted the host.

--Dell Article 52348