Currently, the PandaDoc Document object in Salesforce has built-in lookup relationships with the following standard objects: Opportunity, Lead, Account, and Contact. When documents are generated from these objects, the relationship is automatically populated, allowing for seamless integration and reporting.

When a document is created from other Salesforce objects, such as Quote, the associated object ID is only stored in the Custom Object ID field, which is a text field. This prevents users from leveraging the Quote relationship in native Salesforce reports or automation tools, as no actual lookup relationship exists.