Fix Microsoft 365 Phone Verification Issues for Réunion Island (+262)
Question details
A user cannot complete Microsoft 365 multi-factor authentication (MFA) using a phone number with the +262 country code (Réunion Island).
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Trying to sign in or verify an account synchronized with on-premises Active Directory using SMS authentication.
- Observed behavior
- SMS codes are not received, and the verification page displays an unexpected error when attempting to contact the user.
Ensure you have a stable network connection and verify that your mobile carrier is not blocking automated SMS messages from international sources.
Use Alternative Verification Methods
Bypassing the SMS issue by using Microsoft Authenticator or another MFA method is the fastest way to regain access.
If the SMS gateway is failing to deliver messages to the +262 country code, relying on internet-based authentication methods like the Microsoft Authenticator app can bypass telecom routing issues entirely.
On the verification screen, click on 'Other verification options' or 'Sign in another way'.
Select an alternative method you have already registered, such as the Authenticator app, a voice call, or a security key.
Follow the prompt on your alternative device or app to approve the sign-in request.
Ask an Administrator to Check Sign-in Blocks
If you cannot sign in using any method, a Global Administrator needs to verify your Azure AD account status.
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- 1. Download the installer: Visit the official WPS Office website and download the free installation package.
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Frequently Asked Questions
Why am I not receiving Microsoft 365 SMS codes in Réunion Island?
Routing issues between Microsoft's SMS gateway and local carriers in Réunion (+262) often cause delays or failures in message delivery. Using an Authenticator app is recommended as a more reliable alternative.
Can I use the France (+33) country code instead for Réunion Island?
No, unless your phone number is actually registered with a French carrier using the +33 code. Selecting +33 for a local +262 number will cause the automated verification calls or SMS to fail.
How do I change my default MFA method if I am locked out?
If you cannot access your account to change the default method, you must contact your organization's IT helpdesk or Global Administrator. They can reset your MFA sessions or register a new verification method for you via the Azure portal.
Where can administrators get help for Azure AD MFA country code issues?
Administrators can open a support ticket directly via the Microsoft 365 Admin Center or post detailed logs and issues in the official Microsoft Q&A forums for Azure Active Directory Multi-Factor Authentication.
