Seems BizTalk and Sharepoint are OK, leaving K2. BizTalk picks up the email and sends the email/documents to Sharepoint. Sharepoint receives them but K2 doesn't appear to see them when they get into the Sharepoint 'incoming' folder and, therefore, does not start the workflow by setting up an Indexing task. When we do this manually and 'drop' a document into the 'incoming' folder, K2 sees it and creates the Indexing task.
Does anybody have a suggestion?