Office 365 Migration User Manual

Overview

EdbMails Office 365 Migration handles direct mailbox migration between Microsoft 365 tenants, Office 365 to on-premises Exchange servers, hosted Exchange environments, and legacy platforms, including Small Business Server. It also supports migration in the other direction — from Office 365 back to Exchange Server — along with PST export, public folder migration, archive mailbox migration, and shared mailbox migration, all within a single tool.

Migration jobs are configured through the application's main interface. You can set up multiple jobs, apply filters, schedule runs, and monitor progress without writing a single script or touching PowerShell at any point.

Installation is straightforward — no agents are required on source or target servers.

Who is this tool for?

Not everyone who needs to migrate a mailbox works in IT. Some are small business owners switching providers, individuals moving away from a hosted account, or consultants handling a one-off tenant move for a client. EdbMails works for all of them — the interface is straightforward enough that you don't need a technical background to get through a migration successfully.

That said, it's equally at home in larger environments. IT administrators and system engineers running tenant-to-tenant migrations or Exchange-to-cloud transitions will appreciate the automation — auto-mapping, incremental migration, throttling management, and automatic mailbox creation take most of the manual work off the table when you're dealing with hundreds or thousands of mailboxes.

MSPs will find the per-mailbox licensing model practical — you pay for what you migrate, not for seats or platform subscriptions that sit idle between jobs.

The tool supports all Microsoft 365 plans and Exchange versions going back to Exchange 2007, including hosted providers like Rackspace, GoDaddy, and Intermedia. Global admins can connect via Auto Registration; delegated users and those without full admin rights can use Manual Registration with a full-access account instead.

How the tool works

EdbMails connects directly to both your source and target environments. Once connected, it reads source mailbox contents through Exchange Web Services (EWS) and writes them to the target in a single hop — no intermediary server, no third-party storage, no staging environment in between.

Mailboxes are matched automatically based on display name, email address, first name, and last name. If the automatic mapping doesn't cover everything, you can load a CSV file with custom mappings, including cross-language folder name mappings.

Authorisation to Microsoft 365 uses OAuth 2.0. Your credentials are passed directly to Microsoft's sign-in page — EdbMails never handles or stores them.

The video below walks you through a complete Office 365 tenant-to-tenant migration: