QuickTip: Add vCenter Appliance 5.5 to domain – Error: Invalid hostname

If during adding vCenter Appliance 5.5 server to domain you received error:

Error: Invalid hostname. FQDN is required for joining a domain.

Screenshot_3

Check if you dont have hostname without domain name:

Screenshot_4

Fix it and save settings:

Screenshot_2Try again add to domain:

Screenshot_1Done.