We require that you verify your email address when you add it to your Outlook.com account. That way, we can verify that the email address doesn't belong to someone else.
To verify, sign in to the email address you added and look for a verification email.
Open the verification email and click the link.
If you don't receive a verification email:
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In
Outlook.com, click the
Options icon

, and then click
More mail
settings.
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Under Managing your account, click Your email accounts.
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For the account you added, click Details.
Click Resend verification email.
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Sign in to the email account that you added, and then click the verification link in the email.