Tri co-existence between OCS 2007 R1 , Lync 2010 and Lync 2013 – The reality check

First of all,  tri co-existence is not supported by Microsoft. This article doesn't endorse any unsupported configuration.  I would like to test co-existence between OCS 2007 R1 , Lync 2010 and Lync 2013 in the same AD forest. I have successfully deployed OCS R1 standard edition, Lync 2010 standard edition and Lync 2013 standard edition in contoso.com…

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