Finalizing Exchange Server 2007 Deployment
Technically, your Exchange Server 2007 system is ready to go at this point. If you are so inclined, go ahead and dive into the Exchange Management Console, which should have opened automatically after installation. The console provides a number of recommended action steps, including:
Creating a postmaster mailbox or assigning an existing user account postmaster duties
Making sure that your Offline Address Book settings are configured properly
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