Create a new LDAP external system(New ⇒ LDAP External System) under envA (envB for Berlin) and name it esLDAP.
Set the Environment Configuration ⇒ Connection properties for esLDAP as follows:
Initial Context Factory: com.sun.jndi.ldap.LdapCtxFactory
Provider URL: As necessary for your system, according to the provided syntax For example, ldap://mycompany.co.in:1389/dc=co,dc=in
Authentication: simple
Principal: As necessary for your system. For example, Manager
Credentials: Password, as necessary for your system. For example, exchange
A separate LDAP external system instance is required for each B2B Host.
For all other esLDAP properties, accept the defaults.