When you first create a datacenter or public cloud region, by default only the users of the enterprise that created it will be allowed to use it. To enable other users to deploy and work with VMs, administrators must allow enterprises to access datacenters or public cloud regions. For brevity, these may be collectively called "Allowed datacenters" or "Allowed locations". For each allowed location, the enterprise will have an Apps library with their templates, and their virtual datacenters for deploying VMs.
Allowed locations are where users can work, for example, create a virtual datacenter and deploy VMs. To administer the infrastructure of a location, the administrator must also have the location in their administration Datacenters scope list. See Manage Scopes
To set the datacenters and public cloud regions that an enterprise is allowed to access:
Select one or more datacenters or public cloud regions in the left pane and drag and drop them into the "Allowed Datacenters" right pane
If you have multiple public cloud regions on the platform, they may be grouped provider, which enables you to drag and drop the provider or selected regions. To set default allocation limits and VDC roles for regions in a provider, edit the provider.
To configure resources, including allocation limits for each allowed datacenter and public cloud region, see Configure an Enterprise in a Cloud Location.