Cannot give Active directories Authentication

[ArielStu]

i defined Active directory Authentication, and also is defined in the Security Profile

I cannot select Users/Groups from the Domain to grant to them permissions

See the Attached

[JPM300]

Is it possible that you have the AD authentication Ports blocked somewhere?

What happenes if you leave domain, then rejoin it, reboot the host?

[dhanarajramesh]

What version of Vcenter you are using? if 5.1 or 5.5 did you install and configure SSO ?

[ArielStu]

No, is just  a  New Vmware ESXI 5.5   this one does not have Vcenter,

But i installed another one exactly the same and works

What SSO does to this specific Authentication

[JPM300]

If you are not running vCenter you are probably not running SSO either as they go hand in hand.