Each letter in Correspondence Management can be associated with a post-process. A post-process is nothing but a LiveCycle orchestration with a specific requirement on the input/output parameters.
Sometimes one may wonder that the orchestration that one has created on LiveCycle does not appear in the drop-down of Letter Editor
If the orchestration has two input parameters i.e inPDFDoc , inXMLDoc & one output parameter i.e redirectURL then it will appear in the Letter Editor drop-down.
The above picture shows a sample post-process , The variables highlighted in a red rectangle are mandatory and are minimum requirements for Correspondence Management to recognise the orchestration as the one which is intended to be used with Correspondence Management Solution
One can add additional variables depending up on the logic and operations the orchestration does.
Fore more details on creating post-process visit our online help docs