How to Fix Microsoft 365 Identity Verification Error When Adding a Phone Number
Question details
The user is unable to complete a Microsoft 365 Business sign-up due to an identity verification error that occurs when entering a phone number.
- Product
- Microsoft 365 Business
- Device & OS
- not provided
- Scenario
- Signing up for or purchasing a new Microsoft 365 Business subscription.
- Observed behavior
- The system displays an additional-information error when a phone number is entered, blocking the verification process and preventing the completion of the sign-up.
Before proceeding, ensure you have the exact error message, your Microsoft account credentials, and the phone number you attempted to use ready for review.
Contact Microsoft Support for Account Validation
This is an account identity-verification issue triggered by automated security systems. It typically requires Microsoft's dedicated phone or sales support team to manually review and lift the block.
Identity verification blocks are put in place to prevent spam and fraudulent account creation. When automated systems flag a phone number or IP address, the block cannot be bypassed by the user and requires administrative intervention from Microsoft.
Write down the affected Microsoft account email address, the exact error code or message displayed on the screen, and the phone number you attempted to register.
Navigate to the official Microsoft Support website or log in to the Microsoft 365 Admin Center if you have partial access to your new tenant.
Select the option to contact the billing and sales support team. Choose to either open a support ticket online or request a direct callback.
Explain to the support agent that you are receiving a verification error during a Business sign-up. The agent will review the security block and manually validate your account or phone number.
Use an Alternative Phone Number and Network
Sometimes, using a different valid phone number or switching your network connection can bypass automated security flags.
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Frequently Asked Questions
Why is Microsoft blocking my phone number during sign-up?
Microsoft uses automated security filters to prevent fraud. If your phone number is a VoIP line, has been used to create multiple accounts recently, or your IP address is flagged, the system may block the verification step.
Is this identity verification error a permanent block on my account?
Usually, it is not permanent. It is a temporary security hold designed to protect the platform. It can typically be resolved once a Microsoft support agent manually reviews your details and verifies your identity.
Can I bypass the phone verification step for Microsoft 365 Business?
No, phone verification is a mandatory security requirement when setting up a new Microsoft 365 Business tenant to ensure account authenticity and prevent automated bot registrations.
How long does it take for Microsoft support to lift a verification block?
Resolution times can vary. However, once you contact the dedicated sales or billing support team and provide the necessary account details, the security block is usually reviewed and lifted within 24 to 48 hours.
