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Overview
This article guides you through updating your default sign-in method in Microsoft 365. Changing your default method ensures you can authenticate quickly and securely using the option that works best for you—whether it’s the Microsoft Authenticator app, text message, phone call, or another approved MFA method.
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Instructions
1. Go to: https://mysignins.microsoft.com/security-info
2. Sign in with your Purdue career account.
3. Locate Sign-in method when most advisable is unavailable (look for small text next to the Change link).
4. Click Change and set the desired Microsoft MFA default method.
5. Save changes. Note: At the time Purdue switches to using MFA for the VPN (January 6th, 2026), the default method selected will be used to authenticate to the VPN.
Need Additional Assistance?
If you’re unsure how to update your MFA settings or which method to choose, contact Purdue IT support at 765-494-4000 for assistance setting your default MFA method/other Microsoft MFA issues.
Recommended MFA Method
We strongly recommend setting your default method to:
Microsoft Authentication - Notification
This method works with all VPN systems, including those systems that don’t allow code entry.
Notice for Thinlinc/Radius Application Users
If you use the web application for ThinLinc, all sign-in methods will allow you to authenticate. If you use the native Thinlinc client or other Radius applications at Purdue, you will need to set the default sign-in method to App Based Authentication - Notification. The other sign-in options do not work for these applications at this time.
Still need help? Click the 'Purdue IT Request' button to start a ticket.