Based on the search I have found this see if it helps
You must turn on audit object access at each of the federation servers, for ADFS-related audits to appear in the Security log. This will allow the Federation Service to log either success or failure errors. For more information about how to turn on audit object access, see Audit object access ( http://go.microsoft.com/fwlink/?LinkId=62686).
I have Already enabled it. but I could not find them. In security log, what is source name , is it Microsoft Windows Security auditing ? What is Task Category name, through which I can verify events are getting logged or not ?
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