Vmware
ESXi 4.1 Active Directory Integration
Before starting you need to make sure of a few things
You have correct time synchronization with between your ESX host and the Domain controllers – this is a must. Kerberos is extremely picky when time difference off.
You have proper DNS resolution from the ESX Host, and that the name servers are correct.
Also your ESX host has to have a FQDN – for example:
Hostname: esx1
Domain: maishsk.local
FQDN: esx1.maishsk.local
On the ESXi Host