A straw poll of about 60 senior IT managers from major Times 200 organisations was conducted at this year's annual conference of The Infrastructure Forum.
Although well over half of companies outsourced IT work, none had been invited by their suppliers to talk about their IT strategy.
Delegates at the conference were told that regular, two-way strategic interaction between outsourced users and their suppliers is important to the long-term success of an outsourcing programme.
Urging users to press for a seat on their suppliers' strategy boards, Phil Morris, director of outsourcing consultancy Morgan Chambers, said, "No suppliers today invite users to contribute to strategy. They have user groups to broadcast decisions and get feedback, but customers have far more to contribute to their suppliers and are far more at risk if they don't."
Such communication is important since only 35%-40% of outsourcing projects go well, delegates heard, although that figure is up from about 20% five years ago.