Install a Read-Only Domain Controller 45GET READY.To install a read-only domain controller on a server that has the AD DS role installed, but has not been promoted to a domain controller, perform the following steps.1.If Server Manager is not open, open Server Manager.2.In the left pane, click AD DS. In the right pane, in the yellow bar, click More.3.In the All Servers Task Details dialog box, click Promote this server to a domain controller. The Active Directory Domain Services Configuration Wizard starts. 4.On the Deployment Configuration page, the Add a domain controller to an existing domain option is already selected. Click Next. 5.On the Domain Controllers Options page, click Read only domain controller (RODC). Select the correct site name. In the Password and Confirm password text boxes, type a Directory Service Restore Mode (DSRM) password. Click Next.