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- Duo
Your old phone that had Duo on it was lost, damaged, stolen or replaced
- Knowledge Base
- Duo
This article covers how to set up MFA. Microsoft Multi-factor Authentication (MFA) creates an additional layer of security when logging into your Microsoft Office 365 account. This additional security is associated with something in your possession, such as a personal smartphone, that would be unavailable to someone who gained access to your Microsoft Office 365 account.