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Top Level Navigation: Admin App users in prior releases first select "Settings" (features against their single ODS instance such as Applications, Descriptors, Reports) or "Global" (Vendors and Claim Sets). The Vendors page already suggests, even, the natural workflow: define Vendors, define Applications within those VendoersVendors, obtains Keys. Given the natural order of that workflow, we recommend swapping the order of the "Settings" and "Global" navigation items, and then renaming "Settings" to "ODS Instances":
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User Management: Roles, Permissions, Registration & Login
Because the set of Admin App users are managed by Admin App for use against all the ODS Instances, new user administration features will appear under the "Global" top level navigation.
See User Management for Admin App (Multi-Instance Mode) for design of the users/roles/permissions aspects of Multi-Instance.