Microsoft Account Errors

How to Fix the Microsoft Account Alias Cannot Be Added Error

Muhammad Talha Oct 14, 2026 870 views

Question details

The user is unable to add a phone number or email address as an alias to their Microsoft account due to an error stating it cannot be added.

How to Fix the Microsoft Account Alias Cannot Be Added Error

Product: Microsoft Account
Device & OS: not provided
Scenario: Attempting to link a new phone number or email address as an alias to an existing Microsoft account profile.
Observed behavior: The system rejects the alias addition, returning an error message because the phone number or email is already linked to another active, inactive, or recently deleted Microsoft account.

Before you start

Before attempting to re-add your alias, make a list of any other Microsoft, Skype, or Xbox accounts you own, as you may need to sign into them to remove the conflicting phone number.

Solution 1Recommended

Remove the Conflicting Alias from Other Microsoft Accounts

Free up your phone number by manually removing it from any other Microsoft accounts it is currently linked to.

A phone number can only be associated with one Microsoft account at a time. If you receive this error, the number is likely tied to another account you own or previously used.

Log in with the conflicting phone number

Go to the Microsoft Account login page and sign in using the exact phone number you are trying to add as an alias. Follow the password reset process if you do not remember the login credentials for that number.

Navigate to the account info page

Once logged in, click on the 'Your info' tab situated at the top of the account dashboard.

Access sign-in preferences

Scroll down to the 'Account info' section and click on the 'Edit account info' link.

Remove the phone number

Locate the phone number in your list of aliases and click 'Remove' next to it. Confirm the action when prompted.

Add the alias to your primary account

Log out of this secondary account, sign back into your primary Microsoft account, and repeat the process to successfully add the phone number.

Remove the Conflicting Alias from Other Microsoft Accounts

Recently Deleted Accounts: If the phone number was linked to a recently deleted Microsoft account, Microsoft retains that data for 30 to 60 days. You must wait for this period to expire before the alias becomes available again.

Solution 2

Use an Alternative Email Address or Phone Number

Bypass the conflict entirely by registering a different, unused alias for your primary account.

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Frequently Asked Questions

Why does Microsoft say my phone number is already taken?

This happens when your phone number is currently linked to another Microsoft account, Skype account, or Xbox profile. Microsoft's security policy dictates that a single phone number can only be associated with one account at a time for verification purposes.

Can I reclaim an alias from a deleted Microsoft account?

Yes, but you usually have to wait. Microsoft typically holds the data of a deleted account for 30 to 60 days. After this recycling period, the phone number or email alias is released and can be added to a new account.

Can I merge two Microsoft accounts to resolve alias conflicts?

Microsoft does not currently allow you to merge two different accounts. You must manually remove the alias from one account before you can add it to the other.

Is it safe to use third-party tools to force add an alias?

No. You should always use the official Microsoft account management portal. Third-party tools or unofficial troubleshooting websites that ask for your personal information cannot bypass Microsoft's server rules and often lead to data theft or account compromise.

Login & Account Issues