In this 13-video course, learners prepare for the MS-100 Microsoft 365 Identity and Services certification exam and Microsoft 365 Certified Enterprise Administrator Expert designation. Discover how to migrate user data and e-mail to Office 365, explore methods and tools for performing a migration, and learn how to implement identity models in Office 365. After an overview of admin center's data migration area and available options for migration, learn to use the Exchange Deployment Assistant when migrating mailboxes. Explore the PST (personal storage table) Collection Tool to locate and manage PST files, and import a PST file. Next, learn how to migrate e-mail from another IMAP-enabled e-mail system, discover methods end-users need to migrate e-mail and contacts to Office 365, and methods to migrate e-mail by working with outside partners. Examine two main authentication and identity models when planning for identity management, along with Active Directory cleanup steps, and multiforest deployment considerations. Then study the AD Connect synchronization tool and learn how synchronization is required for certain features and functions. The exercise involves migrating user data.