Error Code Portal
MicrosoftMicrosoft Entra IDError code

AADSTS50012

AuthenticationFailed

Alternative forms: 50012

What does this code mean?

Code AADSTS50012 · An issue reported by Microsoft Entra ID.

Official explanation · Original text

AuthenticationFailed - Authentication failed for one of the following reasons: The subject name of the signing certificate isn't authorized A matching trusted authority policy wasn't found for the authorized subject name The certificate chain isn't valid The signing certificate isn't valid Policy isn't configured on the tenant Thumbprint of the signing certificate isn't authorized Client assertion contains an invalid signature

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

Microsoft Entra authentication and authorization error codes ↗

Creator: Microsoft Corporation and contributors
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Extracted official AADSTS table; Markdown stripped; short English error name selected; original Korean product context added. Official general diagnostic guide is distinguished from code-specific troubleshooting. Documentation license explicitly granted by README Legal Notices; repository LICENSE currently contains MIT terms, also retained as evidence.

Source details · Original licenses and notices