There are two ways to manage Active Directory sites and related components. One option is to use the Active Directory Sites and Services MMC, and other-one is to use PowerShell cmdlets. In order to add/edit/remove sites and related configurations, we need to have Domain Admin/Enterprise Admin privileges.
The Active Directory Sites and Services MMC will be available in any server which has AD DS service enabled or any server/computer that has Remote Server Administration Tools (RSAT) installed. The Active Directory PowerShell module also will be available in any server, which has AD DS role enabled or has the RSAT tools installed.