You can enable Active Directory Authentication Services in VShphere by following the instructions below. This will allow you to setup VShphere to use Active Directory accounts. Note however that in order to actually use your Active Directory account you will have to specify it in the in the “Permissions” tab. Instructions to do so are located http://www.sfentona.net/?p=811.
1) You will need to make sure you have an Active Directory account.
2) Login to VSphere, select the Configuration Tab of the top level of your ESXi server tree. Select “Authentication Services” from the list on the left.
3) Select “Properties” at the far right. Select the Directory Service Type. In this case it will be “Active Directory”. Then enter the name of the Domain you wish to enter.
And you are done.