Create a Keystore (New > Keystore) external system under envA (envB for Berlin) and name it esKeystore.
Set the Environment Configuration > Connection Settings properties for esKeystore as follows:
LDAP: As necessary for your system, for Atlanta and Berlin (the two URLs must be different), according to the provided syntax, for example:
ldap://ex4:1389/o=bhex2_1,dc=stc,dc=com
Password: Valid password for the current Keystore (masked)
Keystore Type: PKCS12 (change from default)
LDAP User Name: The user name you use for the current LDAP system
LDAP User Password: The password you use for the current LDAP system
Keystore Provider: BC (change from default)
When all properties have been configured correctly for your site, click OK.