Look up any AADSTS error code by code, scenario, or plain English. Every entry explains severity, Conditional Access triggers, and concrete fix hints, refreshed automatically from Microsoft Learn. Turn cryptic Azure AD sign in errors into actionable next steps in seconds.
A free, community AADSTS error code reference for Microsoft Entra ID: search by the raw code, by scenario, or just describe the problem in plain English.
Every one of the 349 codes is classified by severity, tagged with who typically needs to act (user vs admin vs app developer), and flagged when it's a Conditional Access trigger rather than a genuine failure, with a fix hint attached.
Auto updated from Microsoft Learn, so new codes and wording changes show up without a manual pass.