An IFB file is nothing but a EIM configuration file which is an ASCII or Unicode (Binary) text file of extension type .ifb. IFB stands for Interface Batch. It resides in the Admin directory of Siebel Server and allows the database administrator to define the type of EIM process like Import, Export, Merge and Delete to be performed.
Why IFB is needed?
An IFB file contains specifications for batch jobs for the data element to be operated based on the process type mentioned in it.