Troubleshoot signing in or up

If you are having issues trying to sign in to or sign up for Teams for your personal life, the following information can help. 

Signing in to Teams for the first time with an existing Microsoft account 

When you try to sign in to Teams for your personal life for the first time and enter your phone number, you get the following message:

XXX-XXX-XXXX is already a Microsoft account.”   

This means that your phone number is already a Microsoft account or is an alias for one. An alias is a phone number or email address that is associated with a Microsoft account. It uses the same account and sign in information. There are a few things to help with this error: 

  • You can use your phone number to sign in since it’s already a Microsoft account. Tap sign in from the message and follow the prompts. Learn more about how to find your Microsoft account.

  • If you’ve recently gotten the phone number or it’s an alias for a different Microsoft account, tap sign up from the message to go through the steps to remove it from the current Microsoft account and move it to the Microsoft account you’d like. Learn more about how to change the email address or phone number for your Microsoft account.

Signing in to Teams with another account 

When you select sign in with another account and enter your phone number, you get the following message:

This phone number has already been taken. Sign in with that number or use a different one.” 

This means your number is either already a Microsoft account, is an alias for another Microsoft account, or you’ve already signed into Teams using this phone number. If you want to have multiple Teams accounts, you will need a unique phone number for each one.  If you want to use this same phone number for a different Microsoft account to sign in to Teams, you can do the following: 

Signing up for Teams 

When you select Sign up for free and enter your phone number to create a new Teams account, you get the following message:

XXX-XXX-XXXX is already a Microsoft account.”   

This means that your phone number is already a Microsoft account or is an alias for one. An alias is a phone number or email address that is associated with a Microsoft account. It uses the same account and sign in information. There are a few things to help with this error: 

  • You can use your phone number to sign up since it’s already a Microsoft account. Tap sign in from the message and follow the prompts. Learn more about how to find your Microsoft account.

  • If you’ve recently gotten the phone number or it’s an alias for a different Microsoft account, tap sign up from the message to go through the steps to remove it from the current Microsoft account and move it to the Microsoft account you’d like. Learn more about how to change the email address or phone number for your Microsoft account.

When you select Sign up for free and enter your phone number to create a new Teams account, you get the following message:

The phone number you typed is already in use. Please type a different number.” 

This also means that your phone number is already a Microsoft account or is an alias for one. There are a few things to help with this error: 

What if I have multiple phone numbers or email addresses with my Microsoft account? 

Your profile on Teams will show the information that you used to sign in (phone and/or email address). If you signed in with your phone number only and it's associated with an email address on your Microsoft account, that email address will also be part of your Teams profile.  

You can update this information on your Microsoft account page at any time.  
 
To learn more about how people can search for you and what information is visible in Teams.  

Forgot Teams sign in or password 

If you forgot your Teams username or Microsoft account sign in, please go to How to find your Microsoft account

If you forgot your Teams password, please go to Recover your account

Contact us

For more help, contact support or ask a question in the Microsoft Teams Community.

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