Replication Agent no longer provides a default user ID and password for Replication Agent instances and the Replication Agent System Database (RASD) at installation.
When you create a new Replication Agent instance, you must provide a user ID and password. You can specify these from the command line or in a response file using the ra_admin utility. The default password policy requires that the password be at least 6 but not more than 255 characters long.
For the RASD, Replication Agent automatically generates a user ID and password. You can change this password later.
See the Replication Agent 15.7.1 SP100 Administration Guide > Setup and Configuration > Replication Agent Utilities > The Command Line Interface > ra_admin.