You need to set up all the sites that you require in your organization. You can run a site import rule to automatically collect the site information for your organization from Active Directory. You can also create sites manually and assign the appropriate subnets and site servers to them.
To manage sites
In the left pane, select the site that you want to delete, and then click Del.
Any subnets that are assigned to the site are not deleted. They become unassigned and may be assigned to a different site. Any site servers inside the affected subnets are not used until they are assigned to a different site.
In the left pane, under the site server, select the site that you want to remove, and then click Del.
The site server is not affected, and it continues to serve any other sites to which it is assigned. This option applies only to the site servers that are manually assigned to sites. A site server that belongs to a site through its subnet membership cannot be removed from that site.
In the left pane, under the site, select the subnet that you want to delete, and then click Del.
Deleting a subnet makes the subnet unassigned to any site. Any encompassed subnets that are not manually assigned to a site also become unassigned. Any site servers on the subnet, or the encompassed subnets, no longer serve the site. However, they continue to serve any sites to which they are manually assigned.
You can assign agents to a site and remove any that you no longer require