You can start a new correspondence from the Activities Execution View in the Workflow Execution Perspective in case the active process has enabled process attachments. Please refer to the section Process Attachments in the chapter Working with Process Definitions of the Stardust Documentation - Modeling Guide Process Attachments in the chapter Working with Process Definitions of the Modeling Guide for information on how to enable process attachments.
To create ad-hoc correspondence for a process, a Correspondence process as described
above is required. You invoke the correspondence process via the Spawn functionality.
Click the Spawn Process icon
in the activity toolbar.
The Spawn Process dialog opens. Select the correspondence process in the list of processes to start.

Figure: Select the Correspondence process
For details on spawning processes please refer to chapter Spawning Processes.