What Is a Windows Domain and What Are Its Advantages?
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If you use a computer at your work or school, it’s almost certainly part of a Windows domain. But what does that actually mean? What does a domain do, and what are the advantages of a computer joining one?

Let’s look at what a Windows domain is, how they work, and why businesses use them.

What Is a Windows Domain?

A Windows domain is essentially a network of controlled computers used in a business setting. At least one server, called a domain controller, is in charge of the other devices. This lets the network administrators (usually IT staff) control the computers on the domain through users, settings, and more.

Because domains aren’t for home users, only Professional or Enterprise versions of Windows Every Single Windows 10 Version You Must Know About Every Single Windows 10 Version You Must Know About Windows 10 comes in over 10 different versions. We compare them all and explain what they're for and who their intended users are. Read More can join one. You’ll also need a copy of Windows Server for the domain controller, as it includes necessary software like Active Directory (more on that later).

How Do You Know If Your Computer Is on a Domain?

If you have a home computer, it’s very unlikely you’re on a domain. You could create a domain on your home network, but there’s not much use to doing so. But if you use a computer supplied by your work or school, it’s almost certainly on a domain.

What Is a Windows Domain - computer domain status

To check if your computer is part of a domain, open the Control Panel and click the System entry. Look under the Computer name section. If you see a Workgroup entry with WORKGROUP (the default) or another name listed, your computer is not on a domain. Likewise, if you see Domain here, then your computer is on a domain.

These steps also allow you to find your domain name on your computer.

Domains vs. Workgroups

Before we discuss more about domains, we should briefly mention how they compare to workgroups. If a computer isn’t on a domain, then it’s part of a workgroup Home Network Tip: How to Share Files & Folders Between Windows User Accounts Home Network Tip: How to Share Files & Folders Between Windows User Accounts Sometimes computer can be physically very close together, but seem miles apart when you try transfer a file. Use this guide to help you fling files from PC to PC with the greatest of ease. Read More . These are much more lax than domains, as they don’t have a central authority. Every computer has its own rules.

In modern versions of Windows, Workgroups are really just a formality, especially with Microsoft retiring the HomeGroup feature How to Replace the Windows HomeGroup How to Replace the Windows HomeGroup This year, Microsoft will retire the Windows HomeGroup feature. Let's take a look at what a HomeGroup was good for, and how you can replace yours. Read More . Windows never asks you to configure one, and they’re only used for sharing files among devices on your network Everything You Need to Know About Home Networking Everything You Need to Know About Home Networking Setting up a home network is not as hard as you think it is. Read More . Microsoft wants you to use OneDrive for this A Quick Guide to OneDrive in Windows 10 A Quick Guide to OneDrive in Windows 10 Can OneDrive replace Google Drive or Dopbox? It depends. To help you decide, we'll tell you all about OneDrive's best features and how to set it up. Read More nowadays, so unless you want to customize your own workgroup, you don’t need to worry about it.

What Is a Domain User Account?

Unlike a personal machine, a domain-connected PC doesn’t use local account logins 5 Tips for Managing Windows User Accounts Like a Pro 5 Tips for Managing Windows User Accounts Like a Pro Windows user accounts have evolved from isolated local accounts to online accounts with various privacy challenges. We help you sort out your accounts and find the settings that work for you. Read More . Instead, the domain controller manages the logins. Using Microsoft’s Active Directory, a user management software, the network administrators can easily create new users and disable old ones. They can also add users to specific groups to allow access to private server folders.

With a domain account, you can sign into any computer that’s on the domain. You’ll start with a fresh account on that PC, but this enables you to use any computer in your company when needed. Thanks to domain accounts, ex-employees can’t sign back in either. If they try to log in with their old password, they’ll see a message that they were denied access.

The Windows login screen looks a bit different when you’re using a domain-connected PC. Instead of a local username, you’ll have to make sure you’re signing into the domain with your domain username. Thus, your login will look something like MyDomain\StegnerB01.

Domain Control and Group Policy in Windows

The biggest advantage of domains is ease of controlling many computers at once. Without a domain, IT staff would have to individually manage each computer in a company. This means configuring security settings, installing software, and managing user accounts by hand. While this might work for tiny company, it’s not a scalable approach and would quickly become unmanageable.

Along with Active Directory’s user management, joining computers to a domain allows you to use Group Policy. We’ve discussed how Group Policy is useful on your own PC 12 Ways Windows Group Policy Can Make Your PC Better 12 Ways Windows Group Policy Can Make Your PC Better The Windows Group Policy grants you advanced control over your system, without having to mess with the registry. We'll show you how to easily customize Windows in ways you didn't think were possible. Read More , but it’s really intended for corporate use.

Using the domain controller, administrators can configure all sorts of security and use policies for all computers. For example, Group Policy makes all the following practices easy to apply:

  • Removing items from the Start Menu
  • Stop users How to Lock Down Windows User Accounts How to Lock Down Windows User Accounts Letting people use your computer while you're gone could lead to problems. We show you how to restrict Windows features on standard or child accounts so others can't access sensitive info. Read More from changing internet connection options
  • Block the Command Prompt
  • Redirect a certain folder to use one on the server instead
  • Prevent the user from changing sounds
  • Map a printer to new computers automatically

This is just a small sampling of what Group Policy allows. Administrators can set these changes up once and have them apply to all computers, even new ones they set up later.

Join or Leave a Domain in Windows

Normally, adding your computer to a domain or taking it off won’t be your job. Your company’s IT staff will take care of joining before you get the computer, and take your computer back when you leave. For completion’s sake, though, we’ll mention how the process works here.

Head back to Control Panel > System again. On the Computer name, domain, and workgroup settings page, click Change settings. You’ll see the System Properties window. Click the Change button next to To rename this computer or change its domain box.

Here, you’ll see a box letting you change your PC name (this isn’t the only place to do so in Windows 10). More importantly, you’ll see a Member of box below. Check the Domain bubble and type the name of the domain to join it. Windows will authenticate this, so you’ll need to actually have a domain to join.

What Is a Windows Domain - change domain

After a PC reboot, your computer will be on the domain. To leave a domain, repeat this process, but select the Workgroup bubble instead. You’ll need a domain administrator’s password to do this, of course.

The Master’s Domain

We’ve taken a look at what Windows domains do and how they’re used. Essentially, domains allow administrators to control large numbers of business PCs from a central location. The local user has less control over a domain-controlled PC than a personal one. Without domains, managing corporate computers would be a nightmare for IT staff.

With new employees and computers replacing separated employees and old machines all the time, a well-regulated system is key for business computers to run smoothly. To keep your own PC running smoothly, check out our beginner’s guide to fixing Windows 10 How to Fix Windows 10: A Beginner's FAQ How to Fix Windows 10: A Beginner's FAQ Need some help with Windows 10? We answer the most frequently asked questions about using and configuring Windows 10. Read More .

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Explore more about: Computer Networks, Windows 10.

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