EXCHANGE_TYPE (Replication ActiveX)

The EXCHANGE_TYPE constants are used with the ExchangeType Property (Replication ActiveX) property of the SQLMerge Object (Replication ActiveX) object to specify whether merge replication changes should be uploaded to the Publisher, downloaded to the Subscriber, or both (uploaded and then downloaded).

Constant	Value	Description
UPLOAD	1	Only merge Subscriber changes with the Publisher.
DOWNLOAD	2	Only merge Publisher changes with the Subscriber.
BIDIRECTIONAL	3	Merge all changes between the Publisher and Subscriber (default).

Замечания

You should use a bidirectional synchronization unless you have a specific reason for separating the upload and download phases.