Error “Idm client exception: Error trying to join AD, error code [11]” when joining a VCSA to AD domain

On a newly created VCSA appliance, I got the following error when joining it to the Active Directory domain

I used the domain’s netbios name\user-name as the user name.

Fix: use the User Principal Name (UPN), user-name@fqdn-domain-name, as the user name. After joining the domain, reboot the VMware Platform Service Controller (PSC).