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Duo Mobile Client upgrade required by February 2, 2026
How do I reactivate Duo Mobile?
Instructions for users to reactivate their Duo Mobile on a new phone
How to use SMS text messages with Duo?
How to use Duo Mobile with Self-Service Password Reset?
How to fix the error "phone cannot be added" in Duo?
How to use a YubiKey
How-to steps for using a YubiKey security token provided by OIT
How do I enroll a mobile phone number in Duo?
What is Duo Verified Push and Risk Based Authentication?
Duo Hardware Tokens
Information on DUO tokens
How to enroll in Duo MFA with the mobile app?
Using Duo Outside the United States
Duo MFA Common Problems and Solutions
MFA Support for Mac Mail
Multi-Factor Authentication FAQ
How to resolve Duo "Network not allowed" block message?