The write operations are not allowed on secondary LDAP server 'server_host'.
Explanation
If configuration parameter 'allowWriteToSecondaryServers' is set to false, all write operations (create, update, delete) are only allowed in primary LDAP server.
User response
Make sure primary server has been started.
If you want to write to secondary LDAP servers, set the configuration parameter 'allowWriteToSecondaryServers' to true.