Windows 10: Why do I keep getting "This alias cannot be added to your account."

Error: This alias cannot be added to your account. Choose a different alias.I'm just trying to add my phone number to my only Microsoft account and I keep getting this error over and over. It's quite frustrating and I'm really not finding any solutions online other than getting a new phone number or using someone elses, which just is not plausible or reasonable in the slightest. This is my ONLY Microsoft account and my phone number has not been used ANYWHERE else. Can anyone please help me resolve this issue?Thanks.

:)

 

Verification code is not being accepted after adding phone number to alias account

Hi,

Thank you for posting your query in Microsoft Community.

Sorry for the inconvenience caused.

Provide more information to help you better:

• 
  Are you trying to verify the Microsoft account?
  
• 
  What happens when you are trying to verify the account?
  

Sorry to inform you that there is no option to add a telephone number as Alias.

I suggest you to refer to the following article to verify the account.

How to use two-step verification with your Microsoft account - Microsoft Support

Microsoft account security info & verification codes - Microsoft Support

You may also refer to the following article to add an alias.

Change the email address or phone number for your Microsoft account - Microsoft Support

Reply with necessary information and the result to help you further.

Thank you.

 

Unable to change primary alias - Microsoft Account

Hi John,

As per the description, you are experiencing issue with you are unable to change the primary alias for your Microsoft account on the system.

I certainly understand your concern and appreciate all your efforts in trying to fix this issue.

I would like to provide you with the information that
an account alias is an email address or phone number that you use to sign in to your Microsoft account. You can have multiple aliases, and use any of them with Microsoft services such as Outlook.com, Skype, OneDrive,
Office, Xbox, Windows and more.

Your primary alias appears on devices such as your Xbox, Surface, and Windows Phone, and is the email OneDrive sends from when you share. You can choose a different alias to be the primary one at any time.

An alias is also the best way to change your email, but keep all your mail.
Add an alias, then make the new alias primary. Then you can
keep or remove the original alias.

I would suggest you to try the following steps and check if that helps.

• Sign in to the
  Microsoft account website.
• Under Account aliases, click/tap on the Make primary link to the right of an
  
  added email alias you want to be your primary alias.

Note: The email alias at the top of the list without a Make primary link is your current primary alias.

• Uncheck the Send me promotional offers from Microsoft box if you like, and click/tap on Yes to confirm.

You may also try the following steps given below and check if that helps.

• Navigate to Start>Settings>Account>Your Account.
• In the right pane, click on Sign in with a local account instead.
• Provide your current Microsoft Account Password.
• Follow the on-screen instructions.
• You can leave the Enter Password option empty, however, it is highly recommended to keep a password on your system to keep it safe.
  

For reference:

I would suggest you to refer to the article given below and check if that helps.

Microsoft account help

Account help

I hope this information is helpful.

Please do let us know if you need any further assistance, we will be glad to assist you.

Thank you.

 

This alias cannot be added to your account. Choose a different alias.

I'm trying to revert my phone number but I get, This alias cannot be added to your account. Choose a different alias.

It's the original phone number in this account.