Configuring audit management database scope
Select the audit management database you want to configure, then click Properties. From the Properties, click the Scope tab to configure audit management database scope. Click Add Site if you want to add a new Active Directory site to the management database or click Add Subnets to add a subnet for the management database to serve. Select the site or subnet from the list of sites or subnets found, then click OK. You can add or remove sites and subnets from the management database at any time using the Scope tab.
Note: All components use Windows authentication whenever possible. However, an audit management database in another forest cannot connect to an audit store database using Windows authentication.