I have followed suggestion from Arleen Saluja-Westerkamp (Agency 73) too, Suggestion is temporary working but Adobe tags do not automatically select field length in the table or any other merge data without custom coding it. Also, I see that you will hit limitation on number of product line items on Opportunities with this option (guess, it's always going to an issue with most of the document solutions)
What I did:
Step 1 - Go to Merge Data and select "Map Salesforce Product Line Items Fields to Adobe Document Fields" 1. Oppotunity (Reference)> Opportunity Product
2. select fields: i.e Opportunity Product Name (Name), Line Description (Description), Quantity (Quantity), Totalprice (TotalPrice), I created a custom field for Event_Date__c
How to Reference these selected fields in the document:
1. Create a table in your word document
2. Start creating tags in table of this document Only (not on Map Salesforce Object Fields to Document Fields) i.e {{!Name1_es_:prefill}} = Opportunity Product Name
3. Test your file, it should update template now and pickup your Name, Quanity, totalprice tags
