The return codes for AuthorizeEx are basically the same as for the sm_agentAPI in the SDK. In particular a return code of 1 means YES, which in turn means that the Authorex has been completed, -1 indicates a communication failure between agent and policy server, -2 indicates a connection timeout, -3 means no existing connection.
Now going back to your problem.The logs you have posted clearly suggests the transaction - 10a7ec9b-42137cef-e81d3889-a1c655d8-8552e931-990 has failed and that NO ATTRIBUTES were returned to generate an assertion.
As next step, Use the Transaction ID - 10a7ec9b-42137cef-e81d3889-a1c655d8-8552e931-990 and look into your Policy server trace logs to understand what is going on.
Regards
Paul Merugu
Architect
CA Services