Topic Last Modified: 2010-12-22

Forest preparation creates Active Directory global settings and objects and Active Directory universal groups for use by Microsoft Lync Server 2010, and grants suitable access permissions on the Active Directory objects. For a description of the universal groups and the global settings and objects created by forest preparation, see Changes Made by Forest Preparation.

Forest preparation also creates objects that contain property sets and display specifiers that are used by Lync Server 2010, and stores them in the Configuration partition.

Ensure that schema preparation changes have replicated to all domain controllers before performing the forest preparation procedure. If replication is not completed, an error occurs.

If you are performing a new Lync Server deployment, you must store global settings in the Configuration partition. If you are upgrading from a previous version of Office Communications Server and you still store global settings in the System container, you can continue to use the System container. However, if you are upgrading to Lync Server 2010 from Office Communications Server 2007, we recommend that you move global settings to the Configuration container before migrating to Lync Server 2010. For details, see "Migrating Global Settings Container" at

The option to migrate global settings from the System container to the Configuration container is not available for Office Communications Server 2007 R2 deployments.

You must be a member of the Enterprise Admins or Domain Admins group for the forest root domain to perform this procedure.

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