To check ADFS (Active Directory Federation Services) sign-in events, you primarily use Event Viewer on the ADFS server. Here’s a step-by-step guide:

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🛠️ Steps to Check ADFS Sign-In Events via Event Viewer:

✅ 1. Open Event Viewer

• Log in to your ADFS server.
• Press Win + R, type eventvwr, and press Enter.

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✅ 2. Navigate to the ADFS Log Path

In the Event Viewer, go to:

Applications and Services Logs
 └── AD FS
      └── Admin

You can also check:

Applications and Services Logs
 └── AD FS
      └── Tracing
           └── Debug (only if tracing is enabled)

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✅ 3. Look for Sign-In Events

Common Event IDs related to sign-ins:

Event ID	Description
1200	ADFS received a request for a token
1202	Token successfully issued
364	ADFS error occurred (common for failed sign-ins)
411	A user was authenticated successfully
510	User sign-in failed
342	Claims issuance failure

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🔍 4. Filter Events for Quick Search

• Right-click on Admin log → Filter Current Log...
• Use Event ID field to filter by IDs like: 364, 411, 1200, 1202, 510.

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✅ 5. Optional: Enable Auditing for Detailed Logs

If you’re not seeing the logs, you may need to enable auditing:

• Open Group Policy Management → Edit the appropriate GPO or Local Security Policy.
• Navigate to: Computer Configuration └── Windows Settings └── Security Settings └── Advanced Audit Policy Configuration └── Audit Policies └── Logon/Logoff
• Enable:
  • Audit Logon Events
  • Audit Account Logon Events
  • Audit Authentication Policy Change

Then run:

gpupdate /force

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📘 Helpful Tip:

For modern ADFS logs and easier analysis, you can use Azure AD Sign-in Logs (if federated), or tools like:

• ADFS Diagnostics Tool (ADFS Rapid Restore Tool)
• PowerShell (Get-AdfsEvent, Get-AdfsAccountActivity)

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