The LSAuthenticationObject method LogonClient was called with the anonymous WindowsIdentity. This condition occurs when LogonClient(WindowsIdentity) ...

The LSAuthenticationObject method LogonClient was called with the anonymous WindowsIdentity. This condition occurs when LogonClient(WindowsIdentity) is called in a context where anonymous access has been enabled in Internet Information Services (IIS). 

User Action 
Ensure that only integrated authentication is enabled for the ls/auth/integrated directory. 

Ensure that LogonClient(WindowsIdentity) is called only from the authentication Web form in the ls/auth/integrated directory.