Scanning & Importing to Devonthink

Dear All
Does anyone know and can someone please tell me how to simply use an HP Officejet Pro 8500 printer/scanner from Devonthink?
The problems I am experiencing are:
•Using Image Capture, the pdf scan does not automatically import to Devonthink.
•I do not automatically get the message to set Devonthink as Scan Destination. How do I do this?
•I am trialling Exact Scan but this does not seem to work or does so erratically. So I need this software anyway?
By the way I thought this was a question for Support, but the button “Send Query” was greyed out and not active.
Thanks for any help or suggestions offered.