In the previous chapters, we looked at Active Directory infrastructure components and how to design an identity infrastructure using these components, as well as different technologies and methodologies. Now it's time to look at Active Directory Domain Service installation and migrations. It would be perfect if we could design and implement an identity infrastructure from scratch, but a majority of organizations require the ability to migrate from one version of Active Directory to a newer version to use the new features or enhancements. At the same time, it is expected that they fix the existing issues in the identity infrastructure. On some occasions, this is also followed with extending the existing infrastructure to meet the new business requirements.

This chapter is mainly focused on gaining hands-on experience of different deployment scenarios of Active Directory Domain Service. It will cover the following:

• Active Directory Domain Service installation prerequisites
• Active Directory Domain Service deployment scenarios
• How to plan an Active Directory migration
• How to migrate to Active Directory Domain Service 2016
• How to confirm successful installation and migration