A first directory server computer system subscribes to update data published by directory servers via an advanced message queuing protocol (AMQP) server. The first directory server receives update data that indicates an update for a LDAP-based database associated with the first directory server. When the received update data is from the AMQP server, the first directory server converts the received update data into an LDAP data format and updates the LDAP-based database using the LDAP formatted update data. When the received update data is not from the AMQP server, the first directory server updates the LDAP-based database using the received update data, converts the received update data into a wire level data format, and publishes the wire level formatted update data to the AMQP server. The AMQP server allows a second directory server that subscribes to the AMQP server to obtain data representing the update.