Error Code Portal
MicrosoftMicrosoft Entra IDError code

AADSTS51004

UserAccountNotInDirectory

Alternative forms: 51004

What does this code mean?

Code AADSTS51004 · An issue reported by Microsoft Entra ID.

Official explanation · Original text

UserAccountNotInDirectory - The user account doesn’t exist in the directory. An application likely chose the wrong tenant to sign into, and the currently logged in user was prevented from doing so since they did not exist in your tenant. If this user should be able to log in, add them as a guest. For further information, please visit add B2B users.

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