Error Code Portal
MicrosoftMicrosoft Entra IDError code

AADSTS80001

OnPremiseStoreIsNotAvailable

Alternative forms: 80001

What does this code mean?

Code AADSTS80001 · An issue reported by Microsoft Entra ID.

Official explanation · Original text

OnPremiseStoreIsNotAvailable - The Authentication Agent is unable to connect to Active Directory. Make sure that agent servers are members of the same AD forest as the users whose passwords need to be validated and they are able to connect to Active Directory.

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