This post will focus on migration resources for assisting with migrating to a new on-premises Exchange Server deployment, and a future post will focus on migrating to Exchange Online. An important thing to note is that Exchange 2003 has reached end of support almost a year ago, so you won't be able to get assistance from Microsoft's support teams if you encounter migration issues.
To help you plan, this article discusses the recommended steps to either upgrade to Exchange 2013 or move to Office 365. It also includes links to the appropriate documentation that provides detailed information about each stage in the process.
When you're upgrading your existing Exchange 2007 organization to Exchange 2013, there's a period of time when Exchange 2007 and Exchange 2013 servers will coexist within your organization. You can maintain this mode for an indefinite period of time, or you can immediately complete the upgrade to Exchange 2013 by moving all resources from Exchange 2007 to Exchange 2013, and then decommissioning the Exchange 2007 servers.
This article contain links to information about planning for and then deploying Microsoft Exchange Server 2013.
The process to move from Exchange 2003 to Exchange 2013 on-premises is a two-step migration. There is no native, direct migration path from Exchange Server 2003 to Exchange 2013 on premises; it must be done in stages. For an Exchange Online migration, you can use the Migration dashboard in the Exchange Admin Center (EAC) to migrate mailboxes and mail content from an on-premises messaging system (including Exchange 2003) to Exchange Online and your Office 365 organization. You can migrate mailboxes and mailbox data from Exchange 2013, Exchange 2010, Exchange 2007 and Exchange 2003, or migrate mailbox data from an IMAP messaging system.
The Exchange Server Deployment Assistant is a web-based tool that asks you a few questions about your current environment and then generates a custom step-by-step checklist that will help you deploy different versions of Exchange Server for different types of scenarios.
Learn how to migrate Public Folders from Exchange Server 2007 and 2010 to Modern Public Folders in Exchange Server 2013. See a live demo walk-through of all PowerShell cmdlets to perform a migration. Learn about administration of Modern Public Folders. Steps to migrate to Microsoft Office 365 is discussed, but not included in the demo due to time constraints.
This video discusses the steps involved, pitfalls, and the experience for end-users. Was their experience better with Exchange Server 2013? This is a real-life session, presented by a Microsoft Certified Master on Exchange, working in the field.