An Office Communications Server 2007 R2 topology is a dynamic environment that should grow with the organization. As your organization changes, your backup and restoration strategies may need to be reassessed. In addition to updating your backup and restoration plan each time you make a change to your topology, your backup and restoration plan should also require periodic reviews to ensure that the plan continues to meet the needs of your business and provide the most effective and efficient backup and restoration methods. The plan should specify who is responsible for reviewing the plan, testing and validation requirements for any new procedures or tools, and who must approve any changes to the plan and related procedures.