The Federation Service was not able to communicate with the AD FS Authentication Package. Until this situation is resolved, ...

Windows Server 2008

The Federation Service was not able to communicate with the AD FS Authentication Package. 

Until this situation is resolved, the Federation Service will not be able to authenticate Active Directory Domain Services users by using Transport Layer Security / Secure Sockets Layer (TLS/SSL) client certificates. 

User Action 
Check for the presence of the authentication package binary (ifsap.dll) in %%systemroot%%\system32. If it is not present, reinstall AD FS. 

Check for the value "ifsap" in the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa value "Security Packages". If this value is absent, add it to the list, and then restart the computer. 

Additional Data 
The data field contains the NTSTATUS error code from LsaLookupAuthenticationPackage.

The Federation Service Proxy successfully updated its configuration information from the Federation Service. Old policy GUID: ... The Federation Service Proxy was not able to update trust information from the Federation Service. The Federation Service's ... The Federation Service rejected a token request because it appeared to duplicate a successful request that was granted to ... The Federation Service URL is not specified. The AD FS Web Agent for Windows NT token-based applications will be disabled. ... The Federation Service was not able to communicate with the AD FS Authentication Package. Until this situation is resolved, ... The Federation Service was unable to read configuration information from the domain controller. User Action Ensure that the ... The Federation Service will authenticate users that are stored in AD DS. AD DS users can be authenticated by integrated authentication, ... The Federation Service will authenticate users that are stored in AD LDS. AD LDS users can be authenticated by user name ... The Federation Services Uniform Resource Locator (URL) determines the location of the resource Federation Service where authentication ...