1. Log on to a computer that is joined to a domain as a member of the Enterprise Admins group for the forest root domain.

2. From the Microsoft Lync Server 2010 installation folder or media, run Setup.exe to start the Deployment Wizard.

3. Click Prepare Active Directory, and then wait for the deployment state to be determined.

4. At Step 3: Prepare Current Forest, click Run.

5. On the Prepare Forest page, click Next.

   Note:
   Forest Preparation allows you to choose where to place the Universal Groups for Lync Server 2010. Choose a location that is consistent with the requirements of your organization.

6. On the Executing Commands page, look for Task status: Completed, and then click View Log.

7. Under the Action column, expand Forest Prep, look for a <Success> Execution Result at the end of each task to verify that forest preparation completed successfully, close the log, and then click Finish.

8. Wait for Active Directory replication to complete, or force replication to all domain controllers listed in the Active Directory Sites and Services snap-in for the forest root domain controller, before running domain preparation. Force replication between the domain controllers in all Active Directory sites to cause replication within the sites to occur within minutes.

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