Use this dialog box to specify one or more Active Directory (AD) servers (i.e., domain controllers) that host an Exchange Server. Specifying additional AD Servers provides complete backup coverage of all Exchange mailboxes.
AD Server List
Displays the domain name of one or more Active Directory (AD) servers. You can use this space along with the Add and Delete buttons to include or remove Active Directory (AD) servers. For example, you may need to add an AD server in these scenarios:
Add
Click to include an Active Directory (AD) server. Enter either a hostname, a fully-qualified domain name, or IP address.
Delete
Click to remove an Active Directory (AD) server.