The Namespace Administrator is a management user who can access the ECS Portal. The Namespace Administrator can assign local users as object users for the namespace and create and manage buckets within the namespace. Namespace Administrator operations can also be performed using the ECS REST API. A Namespace Administrator can only be the administrator of a single namespace.
Because authentication providers and namespaces are replicated across sites (they are ECS global resources), a domain user who is a Namespace Administrator can log in at any site and perform namespace administration from that site.
NOTE If a domain user is to be assigned to the Namespace Administrator role, the user must be mapped into the namespace if the user is not a namespace administrator.
Local management users are not replicated across sites, so a local user who is a Namespace Administrator can only log in at the VDC at which the management user was created. If you want the same username to exist at another VDC, the user must be created at the other VDC. As they are different users, changes to a same-named user at one VDC, such as a password change, is not propagated to the user with the same name at the other VDC.