dn: cn=replica,cn=dc\3Dnorthshore\2Cdc\3Dedu,cn=mapping tree,cn=config
objectClass: nsDS5Replica
objectClass: top
nsDS5ReplicaRoot: dc=northshore,dc=edu
nsDS5ReplicaType: 2
nsDS5Flags: 0
nsds5ReplicaPurgeDelay: 604800
nsDS5ReplicaBindDN: cn=replication manager,cn=config
cn: replica
creatorsName: cn=directory manager
modifiersName: cn=directory manager
createTimestamp: 20180320162523Z
modifyTimestamp: 20180323150229Z
nsDS5ReplicaId: 65535


But "cn=replication manager,cn=config" does not exist in your config.  The two existing replication manager entries you have are:

dn: uid=rmanager,cn=config
uid: rmanager
givenName: replication manager
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: inetorgperson
sn: manager
cn: directory manager
userPassword: {SSHA}Q6BkStQecBSJFsro4jrOP5Suf6fIVemBV4SLGQ==
creatorsName: cn=directory manager
modifiersName: cn=directory manager
createTimestamp: 20180319140621Z
modifyTimestamp: 20180323145435Z
pwdpolicysubentry: cn=cn\3DnsPwPolicyEntry\2Cuid\3Drmanager\2Ccn\3Dconfig,cn=n
 sPwPolicyContainer,cn=config
passwordGraceUserTime: 0

dn: uid=RManager2,cn=config
uid: RManager2
givenName: Replication
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: inetorgperson
sn: Manager
cn: Replication Manager
userPassword: {SSHA}p8hq6oMxQY7TlO8QB3lzUMpbuQsGHri8mmiHEQ==
creatorsName: cn=directory manager
modifiersName: cn=directory manager
createTimestamp: 20171106192255Z
modifyTimestamp: 20171106192255Z


Pick one of these(if you know the password), or create the "cn=replication,cn=config" entry.

Regards,
Mark