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What Is Happening?
Beginning October 1, 2026, Microsoft retired SMS/text messages and voice calls as supported MFA methods for Microsoft 365.
Some users are now being required to use the Microsoft Authenticator app or another modern MFA method sooner than expected. This behavior differs from the information campuses previously received and communicated.
Minnesota State and Microsoft have identified that this issue may affect users who were actively using SMS/text or voice authentication but had previously configured a modern MFA method, such as Microsoft Authenticator, or installed the Outlook app on their cell phone.
Why Is This Happening?
In simplified terms:
If you were using SMS/text messages or voice calls for MFA but had previously registered a modern authentication method, such as Microsoft Authenticator, Microsoft may recognize that modern method as already available on your account.
Because Microsoft sees a supported MFA method already configured, it may immediately require you to use that method when signing in rather than allowing continued use of SMS/text or voice authentication.
Campuses did not anticipate this outcome, and Minnesota State and Microsoft are currently reviewing it.
Do you have Outlook on your phone?
If you have the Microsoft Outlook app installed on your mobile device, try signing in before requesting an MFA reset.
Some users receive a prompt to open the Outlook mobile app and enter a number shown on the sign-in screen. Microsoft may use the Outlook mobile app as a previously registered authentication method, even if you were primarily using SMS/text or voice authentication.
If you see a message similar to:
- Leave the sign-in screen open.
- Open the Outlook app on your mobile device.
- Look for a sign-in approval request.
- Enter the number displayed on the sign-in screen.
- Approve the request and complete the sign-in process.
Detailed instructions are available in:
If you do not have the Outlook app installed, no longer have access to the device where Outlook was installed, or do not receive a sign-in prompt in Outlook, continue to the MFA reset instructions below.
I Cannot Sign In. What Should I Do?
For most users experiencing this issue, the quickest resolution is an MFA reset performed by ITS.
Important
Because MFA protects access to your account and personal information, ITS must verify your identity before resetting your MFA settings.
Identity verification can be completed:
- In person with a valid photo ID, or
- Through a Zoom appointment where you present a valid photo ID
Once ITS verifies your identity, it can reset your MFA registration so you can set up a supported authentication method.
What Happens After My MFA Is Reset?
After the reset, you will need to register a supported MFA method before you can sign in.
The Microsoft Authenticator app is the recommended option for most users.
Instructions for setting up MFA are available in:
Is SMS/Text Authentication Still Available?
No.
Microsoft retired SMS/text messaging and voice calls as MFA methods on October 1, 2026. Users must register and use a supported modern authentication method moving forward.
Need Help?
If you are unable to sign in or need your MFA settings reset, contact the ITS Help Desk. You can stop by the Help Desk locations at BSU or NTC, call us at 218-755-3777 or 218-333-6651, or submit a service request for assistance.
Be prepared to complete identity verification before we can reset your MFA.
Additional Information
Minnesota State and Microsoft are continuing to evaluate this unexpected behavior. We may provide additional guidance as more information becomes available. If we identify new solutions or recommendations, we will update this article accordingly.