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(2025-11-15) Renaming Domain Controllers - Without Breaking It
I have not done this for quit some time, but because of a silly mistake I made in my test lab, I needed to rename the domain controller. Because of how it went, I wanted to share the experience of how it went wrong and also how I solved it. Many years ago, if you wanted to rename a domain controller you had to use NETDOM. Then after some it was also possible to rename through the GUI, which made…
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How to Create a Child and Tree Domain
A child domain is a subdomain of the parent domain. In the active directory hierarchical structure, the function of the child domain is the segmentation of the active directory into smaller parts or segments. For Example, we may have the headquarters of a company serving as the parent domain controller while different branch offices serve as children’s domain to the parent domain. In this…
How to add a new Domain Controller to Existing Domain
A domain controller (DC) provides critical services like authentication and authorization for an Active Directory domain. More accurately, a DC runs on Windows Server operating system and that has Active Directory Domain Services (AD DS) installed on it. All these we will see very shortly. In this guide, we will learn how to how to add a new Domain Controller to Existing Domain. Please see how to…
See what Domain controller you are connected to
nltest /DSGETDC:
Understanding Domain Controller Shared Secrets
Overview Communication between domain controllers (DC) can be confusing and the technical information from Microsoft doesn’t always help. This article is an attempt to provide a simple description of the communication between two domain controllers and why machine accounts and their passwords really matter. Domain Controllers communicate with each other using a shared secret. This is basically…
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How To Configure a Domain Password Policy
How To Configure a Domain Password Policy
Microsoft Active Directory always comes with a default domain password that defines the password requirements like length, age, characters, and many more. This password policy is configured and linked to the root of the domain and affects every user on the domain. This guide is going to show you how you can change that default value to the value you want. You may want to know How to Block…
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ADDS - New AD Error: You must supply a user account name.
ADDS – New AD Error: You must supply a user account name.
While creating a Test Environment to check a few issues I am experiencing on a Previous RODC I set up. The following error kept coming up: “You must supply a user account Name”. Upon doing a bit of research I did not find much except for an article advising to create a new account and adding the user to the Domain Admin Groups. Which is fine and it worked but it did not make sense why I could…
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Active Directory: How to Setup a Domain Controller
Active Directory: How to Setup a Domain Controller
A domain controller (DC) is a server computer that responds to authentication requests. It participates in the replication and contains a complete copy of all directory information for its domain. Ensure the requirements are met here to be able to support AD FS. If your environment requires high availability of IT systems, so when one DC fails, another takes over to ensure successful login, etc.…
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