People picker not able to fetch one user

Question

I am trying to fetch user in people picker. However, in the Production Environment it is failing to resolve one of the user in few of the sitecollection. When I try to get the same user in other sitecollections in the same webapplication , the user is resolvable there(These are recently created sitecollections). On UAT environment this is occuring for the whole farm on every single web application.

Other observations and informations:-

1. Authentication providers - Windows
2. User present in Mange User Profile
3. On UAT - Not resolvable anywhere
4. It is not resolvable in central administration site.

I have already tried the following:

1. Turned off firewall on test.(not worked)

2. Checked the user in server manager -- > user groups(user is present there) (IN TEST SERVER)

3.Used Powershell command (NewSPUser) to set it for site collection, However it is giving error - user not recognized

Any Clues?

Answer 1

I have resolved the issue.

It was occuring because the account was disabled at Active Directory level.

Hope this helps someone with the same problem.