Explanation/Reference:
Explanation:
The exhibit indicates that the federation server proxy could not establish a trust with the Federation Service. Possible causes for this problem are:
The credentials that are used to establish the trust between the federation server proxy and the

Federation Service are not valid, or the Federation Service cannot be reached.
The federation server proxy trust was revoked.

The federation server proxy has been inactive for a long period of time (such as 30 days or more).

Possible solutions are:
Ensure that the credentials that are being used to establish a trust between the federation server proxy

and the Federation Service are valid, and that the Federation Service can be reached.
Run the AD FS 2.0 Proxy Configuration Wizard again to renew trust with the Federation Service.
