As far as I know they do publish but it is only available via VAR in case you opt for the training for that module. Not sure which year they started but user manuals are now available as electronic versions also.
I think best would be to reach out to your VAR and confirm.
If you're on an older version, your VAR may have copies around that they'll give you.
VAR, could sell to you printed copies or in PDF files I supposed