Standalone modular questionnaires are always external, meaning they can only be sent to suppliers.
When inviting suppliers to fill out standalone modular questionnaires, you send invitations to the supplier contacts. You can only send these invitations to suppliers that have at least one supplier contact with an associated e-mail address. The default recipient for each invitation is the supplier’s primary supplier contact, but you can add missing contacts or select different contacts before sending invitations.
You can invite multiple suppliers to fill out multiple standalone modular questionnaires in a single operation.