Microsoft small business knowledge base

Article ID: 2735322 - Last Review: October 11, 2012 - Revision: 1.0


This article describes an update that enables Microsoft Lync 2010 to display extension numbers in contact cards for contacts that use a non-US telephone number together with an extension number.

More information

To display the extension number in the contact card, the administrator must install the following cumulative update:
2737155  ( ) Description of the cumulative update package for Lync 2010: October 2012

After the update is installed, the administrator must set the value of the ShowExtensionInFormattedDisplayString client policy to "true." To do this, the administrator must run the following cmdlets in the Lync Server 2010 Management Shell:
$x = New-CsClientPolicyEntry -Name "ShowExtensionInFormattedDisplayString" -Value "True"
$y = Get-CsClientPolicy -Identity Policy_Identity
Set-CsClientPolicy -Instance $y
Note In this command, "Policy_Identity" is a placeholder for the policy identity. For example, you can use "Global" as the policy identity.

For more information about new Address Book features, go to the following Microsoft website:
General information about new Address Book features (
For more information about how to use the New-CsClientPolicyEntry cmdlet, go to the following Microsoft website:
How to use the New-CsClientPolicyEntry cmdlet (

Applies to
  • Microsoft Lync 2010
kbqfe kbsurveynew kbfix kbexpertiseinter KB2735322
Additional support options
Ask The Microsoft Small Business Support Community
Contact Microsoft Small Business Support
Find Microsoft Small Business Support Certified Partner
Find a Microsoft Store For In-Person Small Business Support