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Deprovisioning features in Grouper allow a deprovisioning administrator to see someone's access and instantly remove it.
They would Grouper will also help notify application administrators where Grouper is not the system of record or where manual deprovisioning is preferred.
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See Also
Blog on Grouper Deprovisioning with Grouper 2.4 (September 2018)
Slack Use Case from University of Pennsylvania