Hi DRGDC,
We can only add lookup field from a list in current (contacts web application) site to the Contacts list. So please
1. Export your list to Excel.
2. Go to Contacts web application site, Create a new list by importing the Excel file to a list.
3. Open the Contacts web database in Access > Export the list we created in step2.
4. Add Lookup filed again, this time you will find the list in available table list.
Best regards,
Emir
Emir Liu
TechNet Community Support
