Joining UCS domain from a Mac OS X client

I completed setting up the UCS appliance in virtual box. Also created a computer account for a Mac OS X client computer (OS Version: 10.11.12) in the UCS. In the Mac Client i opened the Directory Utility via Network Account Server: “Join…” button in the Users & Groups system preferences. In the Directory Utility i have given the AD Domain and the computer ID following the Administrator credentials to join the domain but the message pop-up shows as “Credentials could not be verified as username or password is invalid”. I am giving my credentials correctly and can able to login in the UCS management console. Please advise what needs to be done to resolve this issue.


I have to admit that I’ve never joined a Mac OS client myself. However, when joining a Windows machine you do not create a computer object in the domain first. Instead such an object is created automatically during the join process.

So please remove your newly-created computer object from the domain. Then try joining once more. Also try “administrator”, “domainnamen\administrator” (replace “domainname” with your actual domain name, of course – the short one) and “” as the user name when joining. For example, our FQDN is, and our short (NetBIOS) domain name is “linet”. I’d therefore try “linet\administrator” and "".

Kind regards,