Audience: Exchange Online/Office 365 administrators

Authors: Ayla Kol, Sr. Program Manager Lead, Exchange; Caden Li, Sr. Service Engineer Lead, Office 365 Customer Experience; and Siddhartha Mathur, Principal Program Manager Lead, Exchange

There are many ways to migrate mailboxes and mailbox data from an on-premises email organization to Exchange Online in Microsoft Office 365. Factors such as on-premises server resources, network bandwidth, and Office 365 throttling policy all affect migration performance. Be sure to consider these factors to optimize migration performance when you plan a migration to Exchange Online.

The Exchange Online Migration Performance Guide helps administrators understand the issues that affect a migration to Office 365 and presents best practices for improving migration performance. This guide includes performance results for migrating mailboxes and mailbox data to Office 365 using different migration methods, based on real-world migrations.

Get the Exchange Online Migration Performance Guide (posted as a Word .docx file) from the Office 365 Downloads forum: