Locate the Replication Server user ID you just created, which should match the value of the RS_user configuration parameter in the LTM for MVS configuration file.
Log in to the primary Replication Server as the System Administrator (sa) and enter the following command:
grant connect source to RS_user
where RS_user is the Replication Server user ID you located in the previous step.
Replication Server Commands Reference for information about the grant connect source command