Migrate from any version of Replication Server used with EnterpriseConnect Data Access (ECDA) for Oracle to Replication Server 15.5 ESD #1 with ExpressConnect for Oracle (ECO).
The core functionality of ECO and ECDA for Oracle is the same. However, in ECO, the functionality has been preconfigured and tuned to best suit the usage of Replication Server. The only reason to use ECDA for Oracle over ECO is if the ECO limitations are prohibitive for migrating from a previous ECDA configuration. Any new Oracle replication scenarios should use ECO.