Exchange Migrations
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1h 10m

This Planning Office 365 Workloads and Applications course will teach you how to plan for Office 365 workload deployments and hybrid solutions. You will learn how to identify hybrid requirements for Exchange and SharePoint hybrid solutions, and how to plan connectivity and data flow for Office 365 services, including Exchange Online, SharePoint Online, and Teams. You’ll learn how to plan migration strategies for Exchange, SharePoint, and Teams, and how to determine the best strategies.

Later in the course, you will learn how to plan Office 365 application deployments and how to plan application updates. You’ll also learn about the different update channels and when to use each.

Learning Objectives

  • How to plan for Office 365 workload deployments
  • How to plan for migrations and hybrid solutions
  • How to plan for Office 365 application deployments

Intended Audience

  • IT professionals who are interested in obtaining an Microsoft 365 certification
  • Those tasked with planning Office 365 deployments and migrations


  • A decent understanding of Office 365 workloads, including Exchange Online, SharePoint Online, and Teams

Determining an email migration path to Office 365 can be tricky. In this lesson, we'll cover some different migration planning options that are based on the source email system, as well as some other factors. 

Before beginning an email migration, it's important that you first review the limits and Office 365 performance and best practices guide for Exchange Online. Then you can be sure that you get the performance and behavior that you're expecting after an email migration. 

Since you can migrate mailboxes from Exchange as well as other email systems, we'll break things down by email system. 

Migrating from an existing on-prem Exchange Server environment allows you to migrate all mail, calendar items, tasks, and contacts to Office 365. 

There are three key types of migration methods available. They include the cut over migration, the staged migration, and Exchange Hybrid migrations. You can also use IMAP migrations as well. 

The Exchange Hybrid option can be further broken down into two sub types. Minimal Hybrid, which is also known as express, and Full Hybrid. 

The cut over, staged, and Hybrid options will copy over all mail, all contacts, calendar items, and tasks. 

However, the fourth option IMAP, will only copy over mail data. It's also important to note, that if you're on-prem Exchange organization is older then Exchange 2003, your only migration option is going to be IMAP. The staged and Exchange Full Hybrid migration options, require directory sync to be set up, which does make them a little more complex to plan and implement. 

The Minimal Hybrid, or express migration, can only be used if there will be no ongoing directory synchronization necessary. Essentially what this means is, if you plan to use directory sync one time to get your users staged into Office 365, and then subsequently turn it off, that's the only case where you could use a Minimal Hybrid. 

So, essentially, if you plan on continuing to manage your users on-prem through an on-prem Active Directory, for example, a Minimal Hybrid or express would not be a good option.

About the Author
Learning Paths

Tom is a 25+ year veteran of the IT industry, having worked in environments as large as 40k seats and as small as 50 seats. Throughout the course of a long an interesting career, he has built an in-depth skillset that spans numerous IT disciplines. Tom has designed and architected small, large, and global IT solutions.

In addition to the Cloud Platform and Infrastructure MCSE certification, Tom also carries several other Microsoft certifications. His ability to see things from a strategic perspective allows Tom to architect solutions that closely align with business needs.

In his spare time, Tom enjoys camping, fishing, and playing poker.