The org must have Conga File Storage and Enable Email Notifications features enabled in Conga Composer Setup to utilize the Composer Link Service.
Parameter Description: The NETId (Notification Email Template Id) pre-selects a Conga Email Template to send as the Notification Email when a document is generated and sent with the Composer Link Service.
The parameter value is a Conga Email Template Id. Specify only one Conga Email Template Id as the NETId parameter value. The Conga Email Template body must have content or the Notification Email will not send.
Exclude this parameter to bypass sending an email notification for document interactions with Composer Link Service.