KB ID 0001442
If you separate your PSC (Platform Services Controller) and your vCenter, then you can setup domain authentication on your PSC.
Log into the web console of the PSC > Appliance Settings > Manage > Active Directory > Join > Supply a the domain name, a domain username and password > OK.
You will see it has been successful as now you have a ‘Leave‘ button.
Configuration > Identity Sources > Add.
Set Identity source type to ‘Active Directory (Integrated Windows Authentication)’ > Enter the domain name > ‘use machine account’ > OK.
Select the newly added domain > Click “Set as Default Domain‘.
Users and Groups > Groups > Administrators > Add.
Change the domain to your Windows domain > Search for your Group. (Note: I have created a group called VMware_Admins, you might simply want to use Domain Admins) > OK.
Select the group > Add.
Swap Over To Your vCenter Server
Select the vCenter > Permissions > Select the Administrator Role > Add.
Just as above, change domain and search for your group then add it in.
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