The Federation Service encountered an error while loading the trust policy. The trust policy specifies a token cache scavenge ...

The Federation Service encountered an error while loading the trust policy. The trust policy specifies a token cache scavenge period that is less than its allowed minimum. 
Configured value: %1 
Minimum value: %2 

If this error occurs during startup of the Federation Service, the Federation Service will not be able to start and all requests to the Federation Service will fail until the configuration is corrected. If this error occurs while the Federation Service is running, the Federation Service will continue to use the last policy that was successfully loaded successfully. 

User Action 
This error should occur only if the trust policy file has been modified without use of the AD FS administrative tools. Increase the token cache scavenge period above the minimum.