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University of Illinois Urbana-Champaign presented on their Grouper deployment, with a focus on handling affiliate users, at the Feb. 14, 2018 IAM Online webinar. See the slides: https://www.incommon.org/docs/iamonline/20180214_IAMOnline.pdf and recorded webinar: http://internet2.adobeconnect.com/p03kw4etow2t/
From AD Groups to Grouper, from 2018