Enabling the user account consists of just assigning a Tel URI to the user account. Perform the following steps to assign a Tel URI:
1. Open the Lync Server 2010 Control Panel.
2. Click Users.
3. Enter a username to enable and click Find.
4. Highlight the user, click the Edit button, and click Show details.
5. In the Line URI field, enter an E.164 number with a tel: prefix.
6. Click Commit.
If a conferencing policy that permits dial-in conferencing does not exist at the global or site level, it will not be automatically applied and must be assigned to users. The same goes for if a PIN policy targeted to users has been created.
On the same screen where the Tel URI is entered, perform the following steps to modify the conferencing ...