![]() We also developed tools that both Microsoft Digital and users could use to fix problems that arose.īut before any implementation could begin, we needed to tell everyone at Microsoft about changes coming to their email, coordinate with stakeholders, and prepare support teams. We determined which internal business applications would be affected by mailbox migration and decided how to test them. We took care to prioritize the migration methodically and thoughtfully. Guaranteed business continuity and disaster recovery. ![]() Simplified litigation hold capabilities.Less time needed to support email infrastructure, which freed up resources for other projects focused on features and experiences.Reduced server hardware and storage, which reduced costs.Guaranteed email service uptime of 99.9 percent.More storage (50 GB) for on-premises non-login-enabled accounts, such as system accounts not tied to a user.A much larger mailbox-up to 100 GB-and unlimited archive quotas ( called auto-expanding archiving).Access from anywhere and from any device.Continually updated Outlook Web App and Outlook client.Benefits of using Exchange Onlineīefore releasing Office 365 to the public, Microsoft recognized the advantage-to both users and the company-of migrating to Exchange Online. Note that this paper is an edited version of the original and has been updated for length and to reflect product and organizational name changes. Because each enterprise environment is unique, each organization should adapt the plans and best practices presented here to meet its specific needs. It’s not intended to serve as a general procedural guide. This paper is based on the experience of Microsoft Digital. This paper describes the steps we took, the challenges we faced, and the lessons we learned that IT pros can benefit from as they prepare for their own migration. Microsoft Digital planned and executed the staged migration of more than 150,000 mailboxes from Exchange on-premises servers to Office 365 and Exchange Online in 2015-a multistep process that spanned several months.īy planning ahead and then applying lessons learned during early deployments, we accomplished our goal of moving nearly all user mailboxes and decommissioning the vast majority of on-premises Exchange servers. Microsoft Digital manages one of the largest enterprise infrastructures in the world.
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