We recently setup our vCenter appliance VM and it's working great.  I have successfully joined the VM to our AD.  We can now authenticate vCenter with our AD credentials.  But, when I try to join vsphere html client to the domain so we can also use AD auth there, it fails.  The error
Idm client exception: Error trying to join AD, error code [11], user [spinet\administrator], domain [spinet.local], orgUnit []

Any assistance appreciated as we don't want to use local or shared accounts for vSphere.

Thanks, Tim