. . 326
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Chapter 11 Upgrading to Offi ce Communications Server 2007 . . . . . . . . . 329
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Understanding the Migration from LCS 2005 to OCS 2007 . . . . . . . . . . . . . . 330
Contents xvii
Understanding the Coexistence of LCS 2005 and OCS 2007 . . . . . . . . . . . 330
Feasibility of a Short Coexistence Time Frame . . . . . . . . . . . . . . . . . . . 331
Comfort Factor of a Long Coexistence Time Frame . . . . . . . . . . . . . . . 331
Choosing a Coexistence Time Frame That Works for You . . . . . . . . . . . 331
Choosing the Migration Path from LCS 2005 to OCS 2007 . . . . . . . . . . . 331
Performing a ???Big Bang??? Migration to OCS 2007 . . . . . . . . . . . . . . . . . 332
Performing a Phased Migration to OCS 2007 . . . . . . . . . . . . . . . . . . . . 332
Choosing the Right Time to Migrate from MOC 2005
to MOC 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Migrating Immediately to MOC 2007 . . . . . . . . . . . . . . . . . . . . . . . . . 333
Waiting to Migrate to MOC 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
Planning Your Migration from LCS 2005 to OCS 2007 . . . . . . . . . . . . . . . . . . 334
Identifying Existing LCS 2005 Servers . . . . . . . . . . . . . .
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