FreeViewer Office 365 Tenant Migration Tool is a Windows-based utility that migrates mailboxes, OneDrive, contacts, and calendars between two independent Microsoft 365 tenants in three steps, with a free demo that handles up to two accounts.
What is FreeViewer Office 365 Tenant Migration Tool?
This tool takes source and destination Microsoft 365 tenant credentials and moves Exchange Online mailboxes (primary, archive, shared), OneDrive for Business files, contacts, and calendar appointments between them. It runs on Windows (7 through 11 and Server 2003–2019) and is developed by FreeViewer, the same vendor behind the product page at freeviewer.org. The output is a cloned set of data in the target tenant, preserving folder structure and metadata.
Key Features
- Bulk batch migration — Migrate multiple user mailboxes in a single operation; supports incremental sync for catching post-migration changes.
- Granular filtering — Select specific date ranges and individual folders (Inbox, Sent Items, etc.) to migrate only what you need.
- Free demo version — Migrate up to two user accounts at no cost, with no watermark or feature restrictions on those accounts.
- OneDrive and SharePoint support (advanced) — In the paid version, transfers OneDrive for Business document libraries and SharePoint sites (including document libraries and team site content).
- Exchange workload coverage — Moves primary mailboxes, archive mailboxes, shared mailboxes, and public folder hierarchies.
- Contact and calendar migration — Preserves address books, appointment recurrence patterns, attachments, and meeting invites.
- Teams and personal chats (advanced) — Supported in the advanced version for migrating 1:1 chat histories and Teams channel conversations.
Who is it for?
- IT administrators handling mergers or acquisitions — Move entire user mailboxes and OneDrive data between two corporate tenants without reconfiguring clients.
- Domain consolidation project leads — Consolidate multiple Office 365 tenants into a single tenant after a rebrand or domain change.
- MSPs managing client tenant migrations — Use the batch migration and incremental sync features to migrate dozens of mailboxes in a single pass, then sync new changes before cutover.
What can you do with FreeViewer Office 365 Tenant Migration Tool?
- Migrate mailboxes between tenants: Transfer primary, archive, and shared mailboxes with all email, attachments, and folder hierarchy intact.
- Move OneDrive files and folders: Keep file permissions and metadata when moving user documents from source to target tenant.
- Transfer public folders: Migrate complex public folder trees including permissions and content.
- Selectively migrate calendar and contact data: Move only appointment schedules and address books by setting date range and folder filters.
Pricing
The tool is freemium: the free demo migrates up to two user accounts with full functionality. The paid license starts at $35 (one-time, Windows only). No subscription or recurring fees are mentioned on the source page.
FAQ
Is the FreeViewer Office 365 Tenant Migration Tool really free?
Yes, the demo version is free for up to two user accounts. It migrates the same data types as the paid version—mailboxes, OneDrive, contacts, calendars, public folders—with no watermark or size limits on those two accounts.
Does it support migrating Teams and SharePoint data?
The advanced version supports Teams (1:1 personal chats) and SharePoint (sites and document libraries). The standard license covers Exchange, OneDrive, contacts, calendars, and public folders only.
What platforms does it run on?
It runs on Windows only (Windows 7, 8, 8.1, 10, 11, and Windows Server 2003/2008/2012/2016/2019). There is no macOS or Linux version.
