This course prepares learners for the MS-201 Implementing a Hybrid and Secure Messaging Platform certification exam, which tests abilities of messaging administrators to plan and implement a hybrid configuration, manage migration, secure the messaging environment, and manage organizational settings. In this 16-video course, learners can examine information sharing in Exchange Online, including how to create and manage organizational relationships, and policies to share calendar information with external users. You will examine organizational relationships in Exchange Online; learn to use the EAC (Exchange administrator center) to create an organizational relationship; and learn to add a domain to a relationship. Next, observe how to use the EAC to disable and change free/busy access levels for an organizational relationship, as well as how to remove a relationship. You will learn how to create sharing policies, and how to use the EAC to apply the sharing policy to single or multiple mailboxes. Finally, this course explores how to set the policy as a default, and to disable a sharing policy.