Error Code Portal
MicrosoftMicrosoft Entra IDError code

AADSTS501241

Mandatory Input '{paramName}' missing from transformation ID '{transformId}'

Alternative forms: 501241

What does this code mean?

Code AADSTS501241 · An issue reported by Microsoft Entra ID.

Official explanation · Original text

Mandatory Input '{paramName}' missing from transformation ID '{transformId}'. This error is returned while Microsoft Entra ID is trying to build a SAML response to the application. NameID claim or NameIdentifier is mandatory in SAML response and if Microsoft Entra ID failed to get source attribute for NameID claim, it returns this error. As a resolution, ensure that you add claim rules. To add claim rules, sign in to the Microsoft Entra admin center as at least a Cloud Application Administrator, and then browse to Entra ID > Enterprise apps. Select your application, select Single Sign-On and then in User Attributes & Claims enter the Unique User Identifier (Name ID).

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