Parameter Requirements: The Salesforce ID of a Contact record or a field that contains such an ID.
Parameter Description: ContactID defines the related Contact drop-down menu in the Conga Quote Generation user interface. The ContactID parameter also sets the default email and eSignature recipient, populates the Master-Contact dataset and defines which Contact activities will be logged against.
For Salesforce standard objects with related Contacts (Account, Case, Opportunity, Quote), will automatically populate the related Contact drop-down menu, either from the lookup field on the Master Object or via the related Contact Roles.