Managing Read Only Domain Controller Credentials This lesson covers managing read only domain controller credentials. Read only domain controllers only replicate via communicating with a writeable domain controller that is read only. A read only domain controller has limited capabilities as it is read-only. To make sure users can authenticate, we need to manage information via the writeable domain controller. In this lab-based lesson, participants learn step by step instructions in how to manage read-only domain controller credentials and can follow along with the instructor as he goes through the steps on the screen.