Event ID - 636

Event Id	636
Source	Microsoft-Windows-ADFS
Description	The Federation Service encountered an error while loading the trust policy. The trust policy file path is not valid. Path: %1 The Federation Service will be not be able to start, and all requests to the Federation Service will fail until the configuration is corrected. User Action Correct the configuration to specify a fully qualified file path to an existing trust policy file. This configuration can be corrected in the web.config file or by using the AD FS administration console.
Event Information	According to Microsoft : Cause : This event is logged when the Federation Service encountered an error while loading the trust policy. Resolution : Specify a valid file path to an existing trust policy file in the web.config file Correct the web.config configuration to specify a valid file path to an existing trust policy file. You can correct this configuration in the web.config file or by using the Active Directory Federation Services snap-in. To perform this procedure, you must be a member of the local Administrators group, or you must have been delegated the appropriate authority. To specify a file path to an existing trust policy file: On the federation server, click Start , point to Administrative Tools , and then click Active Directory Federation Services . In the console tree, under Federation Service , right-click Trust Policy , and then click Properties . On the General tab, in Trust policy file , type the correct path to the trust policy file. 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 Links	Event ID 636 from Source Microsoft-Windows-ADFS

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