To allow Lync Phone Edition clients to sign-in using only an extension and a PIN the DHCP scope have to be configured with necessary options.
These options are required:
Option 42: NTP Server
Option 43: Certificate Service Provisioning URL
Option 120: SIP Server
DHCPUtil is a utility included with Lync server 2010 that can be used to help configuring these options
To run this utility locally on a DHCP server you need to first do two things:
Install the VC++ 2008 x64 redistributable on the DHCP server. You can find this on the Lync media.
Copy DHCPUtil.exe and DHCPConfigScript.bat from a Lync server installation to the DHCP server. These files can be found in C:Program FilesCommon FilesMicrosoft Lync Server 2010.
To configure the DHCP server run this script:
DHCPUtil -SipServer fepool.ptown.local -WebServer fepoolweb.ptown.local –RunConfigScript
Option 42 will not be configured correctly, do this manually
To test the configuration run this command from a client or another server: