Specifying the Manager That Sends Email
The Email Manager Compatibility Mode user property specifies how to send email messages. It must specify one of the following values:
- Y. The business component uses Mail Manager to send email messages. 
- N. The Outbound Communications Manager sends email messages. 
You can configure Siebel CRM to deactivate this user property or modify the value for it, but not to create a new instance of it.