Welcome to the Forums - were you able to login to you ESX host using the VI Client with the root login - looking at the log information you provided it seems the root password was rejected - to add your ESX server to virtual center you need to use the root log in -
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Thanks for the welcome.
I can access ESX from the VI client with the root login.
And when tried to add from VC, I can see the host details on the add host wizard, and also the storage, after selecting the finish button on the wizard, it throws out the error message.
Have you tried creating a local user account by logging directly into the ESX host and granting that new local user shell access? That way you can use that new local user to add host in VC. Another thing to consider, does your root password contain special charachters? If so try changing it temporarily to something simple and try to add to VC just to see if the password is not being processed properly.
Hope this helps!
Finally finally finally, after trying a lot of solution, I found that the machine was added on to AD controller, and then this caused the issues, as the pam configuration was not dont correctly, which led to such an issue.
esxcfg-auth configurations were not done properly.
So , I had to rebuild the machine, thats the only option left in my court.
But please let meknow if any one else has resolved this issue.