When you configure a directory synchronization server or requestor in a Microsoft Exchange Server site, a separate server is selected to run each synchronization process. By default, the server selected is the one you are currently connected to in the Administrator window. The directory synchronization object on that server imports and exports information during directory synchronization. The default settings for the directory synchronization object are designed to allow both server and requestor functions to be performed without making any changes. However, you can modify the directory synchronization object configuration.
MS Mail uses templates to record extended information about recipients. If you want to exchange MS Mail template information along with other recipient information during directory synchronization, you can map this information to recipient attributes in the Microsoft Exchange Server directory.