The CQS will have to be replaced with a McAfee Quarantine Manager (MQM). The CQS is specific to the IronMail line.
The MQM is a windows service that works with several products. It will need to be used with MEG if you want to have a central location to quarantine messages, or to have the level of control over who receives notifications that you had with IronMail. MEG does have an on-box solution, but it only has a couple of quarantines and notifications can not be done granularly.
Thank you Andy!!!