Event ID - 679

Event Id679
SourceMicrosoft-Windows-ADFS
DescriptionThe Federation Service encountered an unexpected error while loading the trust policy: %1. Because the Federation Service is not able to start, all requests will fail until the configuration is corrected.
Event Information According to Microsoft :

Cause :

This event is logged when the Federation Service encountered an unexpected error while loading the trust policy

Resolution :

Look for AD FS application event errors

An unexpected exception occurred when the Federation Service started. For the Federation Service to function correctly on this federation server, Internet Information Services (IIS) must be started.

To perform this procedure, you must be a member of the local Administrators group, or you must have been delegated the appropriate authority.

To confirm that the IIS service is started:
  1. Click Start , point to Administrative Tools , and then click Services .
  2. In the details pane, double-click World Wide Web Publishing Service .
  3. In the World Wide Web Publishing Service Properties dialog box, on the General tab, confirm that Service status indicates Started , and then click OK . If the service is not started, click Start , and then click OK .
Verify

Verify that you can access the Active Directory Federation Services (AD FS)-enabled application from a client browser and that the resource can be accessed.
Reference LinksEvent ID 679 from Source Microsoft-Windows-ADFS

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