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Once an IdP exists in in the toolset (i.e. once the first invitation token for the IdP has been redeemed by an invitee), the IdP admin can add more administrators or delete others as he sees fit. You can do the same though, by using the "Add/Remove Administrators" link on the right side of the list of IdPs. Please consult the IdP-level guides to the respective tool of the toolset for further details of administrator management, available here for CAT and here for Managed IdP.
Take control over an IdP
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