I'm sorry @BernieLehman I didn't read closely enough.
There used to be a free, introductory version of KnowledgeSynce included with each sale of MAS 90. I think it was called Business Alerts but I'm not certain. If this is what you are referring to, that version has been discontinued by Sage. The full version is a paid-for solution listed on the current price sheet as Alerts and Workflow.
What version does you customer have deployed? The full version of KnowledgeSync or the old free edition?