Topic Last Modified: 2011-03-17

Dial-in users enter their phone number or extension and a PIN to join conferences as authenticated users. The telephony Line URI specified on Lync Server user accounts is required for authentication.

The procedure in this topic describes how to assign a Line URI for a single user account. If you need to assign a Line URI for multiple user accounts, you can create a script that uses the Set-CsUser cmdlet. For details about using a sample script to assign Line URI to multiple user accounts, see "Assign Line URIs to Multiple Users" at

To configure user account settings

  1. Log on to the computer as a member of the RTCUniversalServerAdmins group, or as a member of the Cs-UserAdministrator or CsAdministrator role.

  2. Open a browser window, and then enter the Admin URL to open the Lync Server Control Panel. For details about the different methods you can use to start Lync Server Control Panel, see Open Lync Server Administrative Tools.

  3. In the left navigation bar, click Users.

  4. In the search field, type the name of the user you want to configure for dial-in conferencing or click Add filter to specify search fields, and then click Find.

  5. Double-click the user name to open the Edit Lync Server User dialog box.

  6. Under Telephony, in the Line URI field, type a unique, normalized phone number (for example, tel:+14255550200).

    You can specify Line URI only if Telephony is set to PC-to-PC only, Enterprise Voice, or Remote call control.
  7. Click Commit.