This guide is intended to assist designers in the decision-making process by providing a clear and concise path for designing the Active Directory® infrastructure, given the relative context. To develop and implement a successful design of Active Directory, this guide addresses numerous questions that must be answered and the many decisions and strategies that must be determined. Considerations for performance, security, manageability, scalability, and many other criteria must be taken into account if the design is to be successful. This guide, when used in conjunction with product documentation, will help companies confidently plan an Active Directory implementation. A sample job aid is included for recording the decisions made during the design process.