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