Can't use Azure Multi-Factor Authentication to sign in to cloud services after you lose your phone or the phone number changes

Original product version:   Cloud Services (Web roles/Worker roles),Azure Active Directory,Microsoft Intune,Azure Backup,Office 365 Identity Management
Original KB number:   2834954

Symptoms

Assume that you're a Microsoft cloud services admin who has Microsoft Azure Multi-Factor Authentication enabled. If you lose your phone or your phone number has changed, you can't sign in to your cloud services account (such as Office 365, Azure, or Microsoft Intune) because you didn't receive the text message or voice call from the Multi-Factor Authentication service.

Resolution

Ask another cloud services admin to reset your Multi-Factor Authentication settings. To do this, the admin should follow these steps:

  1. Sign in to the cloud service portal as an admin.
  2. Go to https://account.activedirectory.windowsazure.com/usermanagement/multifactorverification.aspx.
  3. Select the check box for the admin account whose Multi-Factor Authentication settings you want to reset.
  4. Click Manage user settings.
  5. Select the Require selected users to provide contact methods again check box, and then click Save.

MORE INFORMATION

Still need help? Go to Microsoft Community or the Azure Active Directory Forums website.