How to Change Your Microsoft Username: Account Names, Display Names, and Email Aliases Explained

Changing your Microsoft username sounds straightforward — but what you're actually changing depends on which "name" you mean. Microsoft accounts use several overlapping identity fields, and updating one doesn't automatically update the others. Understanding the difference is the first step to making the right change.

What Does "Microsoft Username" Actually Mean?

Microsoft accounts have three distinct name types, and people commonly use "username" to refer to any of them:

• Display name — the name shown in apps like Outlook, Teams, and Xbox. This is what other people see.
• Microsoft account alias / sign-in email — the email address you use to log in (e.g., [email protected] or [email protected]).
• Local Windows account username — the name tied to a user profile on a specific Windows PC, separate from your Microsoft account.

Each one is changed through a different process, in a different location.

How to Change Your Microsoft Account Display Name

Your display name is the easiest to update and the most visible — it appears across Microsoft 365, Outlook.com, Teams, Skype, and Xbox.

Steps:

1. Go to account.microsoft.com and sign in.
2. Select Your info from the top navigation.
3. Click Edit name under your current display name.
4. Enter your first and last name, complete the CAPTCHA, and save.

Changes typically propagate across Microsoft services within a few minutes to a few hours. Some apps like Teams or Outlook may require a sign-out and sign-in before the updated name appears.

How to Change Your Microsoft Account Sign-In Email (Alias)

Your sign-in email address — sometimes called your primary alias — is what you type into the login box. This is harder to change outright because it's tied to authentication.

Microsoft doesn't let you rename an existing alias directly. Instead, you manage aliases:

Steps:

1. Go to account.microsoft.com and sign in.
2. Navigate to Your info → Edit account info → Add email.
3. Create a new alias — either a new @outlook.com address or an existing external email you own.
4. Set the new alias as your primary alias.
5. Optionally, remove the old alias if you no longer want it associated with your account.

⚠️ One important note: if your Microsoft account is tied to a work or school (via Microsoft Entra ID, formerly Azure Active Directory), your IT administrator controls the sign-in address — you won't be able to change it yourself through the standard consumer portal.

How to Change a Local Windows Account Username

If you're using a local account (one not connected to a Microsoft account), the username is stored on your PC and changed through Windows settings — not through a Microsoft web portal.

Via Settings:

1. Open Settings → Accounts → Family & other users.
2. Select the account you want to rename and click Change account type (note: renaming here is limited through this path).

Via Control Panel (more reliable for renaming):

1. Open Control Panel → User Accounts → Change your account name.
2. Type the new name and confirm.

Via Computer Management (for administrators):

1. Right-click This PC → Manage.
2. Go to Local Users and Groups → Users.
3. Right-click the account and select Rename.

This method changes the display name for the account but does not rename the underlying user profile folder (e.g., C:UsersOldName). That folder rename requires additional steps and carries some risk of breaking application paths if not done carefully.

Key Variables That Affect Your Process 🔧

The right method depends on factors specific to your setup:

What Changes — and What Doesn't

Changing your display name updates how you appear to others in Microsoft apps. Changing an alias shifts your sign-in credentials. Renaming a local account changes what Windows shows on the login screen.

None of these actions are automatically synchronized. 🔄 A user who changes their Outlook.com alias may still see their old name appear in Teams until the cache refreshes. A user who renames their Windows local account will still have a user profile folder bearing the original name.

There's also a meaningful difference between accounts used primarily for personal productivity, gaming (Xbox), or professional collaboration (Microsoft 365 / Teams). Each context has its own display logic and, in some cases, administrator controls that override personal preferences.

How your specific account is configured — consumer vs. enterprise, local vs. cloud-linked, solo vs. managed — shapes which of these paths applies to you and how much of the change you control directly.