Hola,
Por favor danos mas datos, mensaje de error, algun cambio realizado, SO, etc...
Salu2
Edit: Puedes chequear los siguientes links:
Descripción de la actualización para Communicator 2007 R2: octubre de 2009:
http://support.microsoft.com/kb/972884
problem with office Communicator 2007 R2:
http://social.technet.microsoft.com/Forums/es-ES/mocses/thread/d3377c57-7cb4-42c5-922d-09df0d1d430a/
Communicator 2007 R2 Upgrade and Interoperability Issues:
http://technet.microsoft.com/en-us/library/dd441226(v=office.13).aspx
Troubleshoot Communicator Synchronization Issues with the Corporate Address Book:
http://technet.microsoft.com/en-us/library/ee817584.aspx
Description of the cumulative update package for Communicator 2007 R2: January 2012:
http://support.microsoft.com/kb/2647093
Cómo solucionar problemas de autenticación de Communicator de Office:
http://support.microsoft.com/kb/2368074
Leonardo Ponti
MPN: Microsoft Partner Network
MCC: Microsoft Community Contributor 2011
MCSE: Microsoft Certified Systems Engineer (Windows Server 2003)
MCSA: Microsoft Certified Systems Administrator (Windows Server 2003)
MVA: Microsoft Virtual Academy
MAP: Microsoft Active Professional (2010/2011)
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