After a Prism Central upgrade, IAM authentication settings may require reconfiguration.
* Option D (Log in with a local admin account) is correct:
* If IAM authentication fails, thelocal admin account must be usedto check domain settings.
* Option A (Ping the Domain Controller) is incorrect:
* Network connectivity is important, but theissue is likely related to IAM settings, not network reachability.
* Option B (Check firewall port 9441) is incorrect:
* Port 9441 is used forSSO authentication, butport issues usually result in login delays, not complete failures.
* Option C (Validate signing certificate) is incorrect:
* While certificates can cause issues,local admin login should always work.
References:
* Nutanix KB #Troubleshooting IAM Login Issues After a Prism Central Upgrade
* Nutanix Documentation #Managing User Authentication and IAM Integration