Select Contacts from Active Directory
Use the Select from Active Directory dialog box to find contacts who you want to enable for Skype for Business. In the search box, type the SIP address or display name of the contact you want to find. To retrieve all available contacts, do not type anything in the search box.
For details about the different procedures that you can perform by using the Skype for Business Server Control Panel, see Manage Skype for Business Server 2015.