In vSphere 6.0 U2, you can have an External PSC or an Embedded PSC. The below process is to add an External PSC to the Active Directory Domain. Login into the vCenter server, go to Administration tab, go to System Configuration –> Nodes and click on the PSC node you want to add to the domain. Click on the node, go to Manage tab, click on Active Directory and click on Join button Provide the Domain name and its credentials (It could be a read-only service account in the domain) to join the PSC to the domain once credentials are provided, click OK to proceed. Note that the only way for you to know that this process is complete is that you get no error and there is no entry in the recent tasks tab in the vSphere web client. If that is the case then the domain add is successful. Now, you will need to reboot the PSC Once the PSC is rebooted, you can go back into the vCenter server and to the node and you can see that this node (PSC) is now ad