The organisation you want to associate with a Project or Benefit as a Supplier. Typically these are organisations who are responsible for delivering a Project that a Benefit is associated with, and ensuring the success of the Benefit itself.
They will be required to submit Evidence by the appropriate delivery dates and to submit Scores once the Benefit is marked as Completed.
If the organisation is paying for one or more of its users to be administrators, these users will be able to download reports, and to invite and assign their own employees to individual benefits, so that the most appropriate people continue to get the email notifications and are able to submit their Evidence and Scores.