AADSTS50074

What it means

Strong authentication was required and the user didn't pass the MFA challenge.

How to fix it

Often expected mid-flow. If it repeats, check the user's registered methods.

How to investigate

1. Open the sign-in log entry and check the Authentication details tab to see which methods were offered and which step failed.
2. Check the user's registered methods under their Authentication methods blade.
3. Check which Conditional Access policy or authentication strength asked for MFA.
4. Search the sign-in logs for the request ID or correlation ID from the troubleshooting details on the error page.

Guides on this site

• Authentication strengths: requiring the right kind of MFA

Tools that help

• Sign-in log explainer
• Troubleshooting wizards
• Microsoft's error lookup for 50074 ↗