Affiliated with, sponsored by, partnered with ...
They're phrases used by the not-for-profit government associations
when they talk about deals they have cut with for-profit companies,
usually to provide goods and services to members. Mayors, county
executives and other members of national membership organizations may
wonder how their associations decide to make agreements with
particular technology vendors and e-government companies, why they do
it, and how those deals benefit the associations and their members.