MSFT ha liberado nuevas actualizaciones del cliente Lync 2010, tanto para la versión x86 como x64. Aquí os dejo los enlaces de descarga:

Update

Lync 2010 Hotfix KB 2842627 (64 bit)    This download includes all available updates for Lync 2010         .

FREE Release Date: 7/12/2013

Update

Lync 2010 Hotfix KB 2842627 (32 bit) This download includes all available updates for Lync 2010          .

FREE Release Date: 7/12/2013

Esta actualización acumulativa corrige los siguientes errores o incompatibilidades:

• 2861302

  (http://support.microsoft.com/kb/2861302/ )

  User isn’t redirected to a customized Help URL in Lync 2010

• 2861306

  (http://support.microsoft.com/kb/2861306/ )

  Lync 2010 crashes when you listen to a new voice mail on a computer that is running Outlook 2007 or Outlook 2010

• 2861311

  (http://support.microsoft.com/kb/2861311/ )

  "Direct reports" strings are translated incorrectly in the Italian version of Lync 2010

• 2861312

  (http://support.microsoft.com/kb/2861312/ )

  Can't join a meeting when proxy authentication is required in Lync 2010

• 2861319

  (http://support.microsoft.com/kb/2861319/ )

  Can’t join an audio or video conference when basic authentication for a proxy server is required in Lync 2010

• 2861325

  (http://support.microsoft.com/kb/2861325/ )

  Proxy authentication fails when you join a meeting created in a non-federated organization in Lync 2010

• 2861328

  (http://support.microsoft.com/kb/2861328/ )

  Conference ID displayed as not available when an online meeting invitation is updated to include the dial-in conferencing feature by a Lync 2010 user

• 2861329

  (http://support.microsoft.com/kb/2861329/ )

  JAWS screen reader does not read your current status in Lync 2010

• 2861330

  (http://support.microsoft.com/kb/2861330/ )

  JAWS screen reader doesn't read "Sign-in address" in the local language in Lync 2010

• 2861331

  (http://support.microsoft.com/kb/2861331/ )

  Update sorts contacts by Furigana in Lync 2010

Y también corrige estos errores o incompatibilidades:

• 2815347

  (http://support.microsoft.com/kb/2815347/ )

  Description of the cumulative update package for Lync 2010: April 2013

• 2791382

  (http://support.microsoft.com/kb/2791382/ )

  Description of the cumulative update package for Lync 2010: March 2013

• 2737155

  (http://support.microsoft.com/kb/2737155/ )

  Description of the cumulative update package for Lync 2010: October 2012

• 2726382

  (http://support.microsoft.com/kb/2726382/ )

  MS12-066: Description of the security update for Microsoft Lync 2010: October 9, 2012

• 2701664

  (http://support.microsoft.com/kb/2701664/ )

  Description of the cumulative update package for Lync 2010: June 2012

• 2670326

  (http://support.microsoft.com/kb/2670326/ )

  Description of the cumulative update package for Lync 2010: February 2012

• 2514982

  (http://support.microsoft.com/kb/2514982/ )

  Description of the cumulative update package for Lync 2010: November 2011

• 2571543

  (http://support.microsoft.com/kb/2571543/ )

  Description of the cumulative update package for Lync 2010: July 2011

• 2551268

  (http://support.microsoft.com/kb/2551268/ )

  Description of the cumulative update package for Lync 2010: May 2011

• The following updates for Lync 2010 were released in April 2011.
  • The following hotfix was released on April 26, 2011:
    2540951

    (http://support.microsoft.com/kb/2540951/ )

    Description of the cumulative update package for Lync 2010: April 2011

  • The following cumulative update was released on April 4, 2011:
    2496325

    (http://support.microsoft.com/kb/2496325/ )

    Description of the cumulative update package for Lync 2010: April 2011

• 2467763

  (http://support.microsoft.com/kb/2467763/ )

  Description of the cumulative update package for Lync 2010: January 2011 

Espero que os sea de utilidad!!!