Configuring Principal Propagation in the Integration Directory 

In the Integration Directory, sender and receiver agreements can be configured to propagate user identities. The Propagate principal checkbox is available for this purpose. Since one sender agreement and one receiver agreement is used for each message to be processed, the checkbox must be selected in both the corresponding sender agreement and the corresponding receiver agreement when principal propagation is to be active for this message.

It is a prerequisite that principal propagation is enabled in the Integration Server itself (see Enabling Principal Propagation for ABAP Messaging Components).