As indicated in the PDF:
- The Flexmail account has to be configured in Designer, in the separated section Flexmail Accounts
- Then, follow topic 6.2: Configuring the Flexmail Synchro (for admins and developers) from the PDF.
That is configuring the scheduled workflow
- Optional configurations, e.g.
- Adding extra custom fields to the Flex synchro, mapped with Flex freefields
- Setting the synchro direction(s)
That's the technical work. Of course the functional changes for the customer are much bigger. Extra training is required