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https://docs.google.com/document/d/1iLbTbPe0qop0BW7L5nbEpYJY21vrg6I8nNdQMGU2DDk/edit
Also of interest, Grouper automatically managed recent memberships feature added in May 2020: https://spaces.at.internet2.edu/x/2wEOCg
Documentation from University of Nebraska on how to accommodate a 90 day grace period for employees.
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