Microsoft Account Errors

How to Change Outlook.com Sender Address with an Email Alias

Huda QurayshiHuda Qurayshi Oct 28, 2026 868 views

Question details

Users need to change an automatically generated Outlook.com sender address to a recognizable email address using an account alias.

How to Change Your Outlook.com Sender Address with an Email Alias
Product
Outlook.com
Device & OS
not provided
Scenario
Sending emails using a Microsoft 365 Family account where the default address appears as an unreadable string.
Observed behavior
An automatically generated, unrecognizable Outlook.com address is displayed as the sender instead of the user's actual email address.
Before you start

Ensure you have your Microsoft account credentials ready and can receive security verification codes via your alternate email or phone number.

Solution 1Recommended

Create and Add an Outlook.com Alias

Add a new or existing email address as an alias to your Microsoft account to use as your primary sending address.

An email alias acts as an additional email address associated with your Outlook.com account. It shares the same inbox, contact list, and account settings as your primary address, making it a seamless way to fix display name issues.

1
Sign in to Microsoft Account

Go to the Microsoft Account alias management page (https://go.microsoft.com/fwlink/p/?linkid=864833) and sign in with your credentials.

2
Create or add address

Under the 'Add an alias' section, choose to either create a new Outlook.com address or add an existing email address as your alias.

3
Confirm the alias

Select 'Add alias' to save your changes. You can now select this alias as your default sender address when composing new emails.

Create and Add an Outlook.com Alias
Alias Settings: You can use the same password to sign in with any of your aliases, and all emails will land directly in your single Outlook.com inbox.
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Frequently Asked Questions

Will adding an alias change my Microsoft account password?

No, an alias uses the exact same password and account settings as your primary Microsoft account.

Can I use an email address from another provider as an alias?

Yes, during the setup process, you have the option to add an existing email address from a third-party provider to your Microsoft account.

Why does my Microsoft 365 account show a random string of letters and numbers as the sender?

This usually occurs when you register a third-party email address as the primary alias for your Microsoft account. Adding an Outlook.com alias easily resolves this issue.