Auth Diagnostics 1.4

Auth Diagnostics by Microsoft

Auth Diagnostics is a Microsoft tool that helps IT administrators, support engineers, and developers quickly identify and resolve sign-in and authentication issues. It streamlines troubleshooting across Microsoft Entra ID (formerly Azure Active Directory), on-premises Active Directory, and federated identity providers, turning complex protocol data into clear, actionable guidance.

Key capabilities:

• Guided workflows for user sign-ins, application registrations, and federation scenarios
• Automated checks for OAuth 2.0, OpenID Connect, SAML 2.0, WS-Fed, Kerberos, and NTLM
• Validation of endpoints, DNS, and SSL/TLS certificates, including time skew detection
• Token decoding and analysis to surface claim, scope, and audience issues
• Conditional Access and multifactor authentication insights to pinpoint policy-related failures
• Federation and ADFS health checks, including metadata and endpoint configuration
• Exportable diagnostic results and step-by-step remediation guidance

Benefits:

• Faster root-cause identification and resolution
• Consistent, repeatable troubleshooting across cloud and hybrid environments
• Reduced escalations through clear, prescriptive fixes and references to best practices

Auth Diagnostics gives teams the confidence to remediate authentication problems efficiently while improving the security and reliability of their identity environment.

Auth Diagnostics is developed by Microsoft. The most popular version of this product among our users is 1.4. The names of program executable files are authdiag.exe, diagnos3.exe, diagnos3u.exe and dslmon.exe.