Is there a quick way to see which users have Sys Admin rights in a given environment?
If so, is there a way to bulk-change their rights?
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I am unsure of a way to bulk-change rights without using a plugin, however, you can look at the OOB group 'Designers' to quickly spot check and find system administrators, as when a user is created or given system administrator rights, they automatically become part of this group. More information on automatic group membership for different user roles can be found here: docs.appian.com/.../User_Roles.html
One quick way to see all sys admins is to create a group with the membership rule "Add users whose User Type is Administrator" . For an example, you can look at the OOTB "Designers" group, which has this membership rule by default.