The following error was reported from a FIM import:
Handling of LDAP search request from user hrma on connection 127.0.0.1:51554 targeting OU=HR,DC=IdentityBroker with a scope of WholeSubtree failed with error "An unrecognized critical control was supplied.". Duration: 00:00:00.
From the error log:
20160403,23:58:20,UNIFY Identity Broker,LDAP engine,Error,"Handling of LDAP search request.
Going by the frequency of the error I believe that it is from the Event Broker agent:
Customer support service by UserEcho