If a user or user group has the vCenter Server administrator role on a vCenter Server instance when you install Site Recovery Manager, that user or user group obtains all Site Recovery Manager privileges.
If you assign the vCenter Server administrator role to users or user groups after you install Site Recovery Manager, you must manually assign the Site Recovery Manager roles to those users on Site Recovery Manager objects.
You can assign Site Recovery Manager roles to users or user groups that do not have the vCenter Server administrator role. In this case, those users have permission to perform Site Recovery Manager operations, but they do not have permission to perform all vCenter Server operations.