Lync 2013: Prepare Current Forest task failed
November 22, 2012
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I am installing Lync 2013 in AD where I already have Lync 2010 installed. Lync 2010 security groups are in a dedicated OU.
Forest Preparation failed with the following error:
Error: Existing universal groups were found in "OU=Lync,OU=Demo Security Groups,DC=XXX,DC=XXX,DC=XXX,DC=com". Specify where to create new Lync Server universal groups explicitly at the command line with the GroupDomain parameter.
Move Lync security groups to a default “Users” container in AD.
the resolution is found here: http://social.technet.microsoft.com/Forums/zh/ocsplanningdeployment/thread/f3ab494b-fc9e-43ae-8268-411ead5e7317