can a service provider validate an authorization delegation?

[Cantor, Scott]

On 2/1/17, 9:10 AM, "users on behalf of Robert Duncan" <users-bounces at shibboleth.net on behalf of Robert.Duncan at ncirl.ie> wrote:

>    A service provider implements a trust model for federated users to perform actions on an API - say, auto scaling a cloud
> app. Can the service provider verify the existence of the federated user (trustor) to authorize the trustee?
> e.g. a simple revoke/approve metric

Whatever you're trying to ask, I have no idea what you mean by it.

-- Scott