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Microsoft® Lync Server 2010 Unleashed by Tom Pacyk, Andrew Abbate, Alex Lewis

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Office Communications Server 2007 R2

As mentioned, there is no direct migration path from LCS 2003 or 2005 to Lync Server 2010. An intermediate step of migrating to OCS 2007 R2 is required. Although the focus in this book is on Lync, it would be remiss to disregard this step completely, so this section reviews the OCS 2007 R2 process at a high level. A key issue is that the administrator must install the OCS 2007 R2 schema and server(s) before installing the Lync Server schema.

Although there are a few client-side issues for coexistence, assume this is a short-term intermediate step on the way to Lync and that the Lync client is rolled out before going live. On the server-side, administrators want to make sure they are on at least LCS 2005 Service ...

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