Book Image

Microsoft Exchange Server PowerShell Essentials

By : Biswanath Banerjee
Book Image

Microsoft Exchange Server PowerShell Essentials

By: Biswanath Banerjee

Overview of this book

PowerShell has become one of the most important skills in an Exchange administrator's armory. PowerShell has proved its mettle so widely that, if you're not already starting to learn PowerShell, then you're falling behind the industry. It isn't difficult to learn PowerShell at all. In fact, if you've ever run commands from a CMD prompt, then you'll be able to start using PowerShell straightaway. This book will walk you through the essentials of PowerShell in Microsoft Exchange Server and make sure you understand its nitty gritty effectively. You will first walk through the core concepts of PowerShell and their applications. This book discusses ways to automate tasks and activities that are performed by Exchange administrators and that otherwise take a lot of manual effort. Microsoft Exchange PowerShell Essentials will provide all the required details for Active Directory, System, and Exchange administrators to help them understand Windows PowerShell and build the required scripts to manage the Exchange Infrastructure.
Table of Contents (17 chapters)
Microsoft Exchange Server PowerShell Essentials
About the Author
About the Reviewer

Chapter 8. Managing High Availability

The concept of Database Availability Group (DAG) was introduced in Exchange 2010, and it has gone through some key improvements in Exchange 2013 and some architectural changes in Exchange 2016. DAG provides the infrastructure to protect the content of your mailbox databases by making copies on other Mailbox servers in your organization, and hence, providing high availability and site resilience.

There is a difference between High Availability and Site Resilience, which is important to understand. We say a messaging system is highly available if all the components are working in a way that if one component fails, the service and the data fails over to one of the working servers automatically. Typically, high availability events are triggered by servers or components failing within a single datacenter. Whereas, in the case of Site Resilience, the service and data is restored with manual intervention from administrators.

In this chapter, you will learn about...