A vendor administrator is somebody at the supplier who can sign in and run their own listing — the profile, products, offers and announcements. They see their vendor and nothing else of yours.

Inviting one

Invite them by name and email address and they are sent an invitation. It can be resent if it goes astray, and an administrator can be detached when they leave the vendor.

Where a vendor has a primary contact, mark them as such — that is who gets chased when the listing goes stale or the subscription lapses.

Always invite two

Vendors with no administrator at all

Some vendors are managed by your own team instead. That is a decision worth making explicitly: somebody at your organisation then owns keeping the listing accurate, and it will go out of date if nobody does.