Tenant Migration

How to Migrate Outlook Mail and Calendars Between Microsoft 365 Tenants

Tauseeq Magsi Sep 25, 2026 869 views

Question details

The user needs to transfer Outlook email and calendar data to a new Microsoft 365 tenant without having administrator privileges or an Enterprise Agreement migration license.

How to Migrate Outlook Mail and Calendars Between Microsoft 365 Tenants

Product: Microsoft Outlook
Device & OS: not provided
Scenario: A small organization is separating from a larger Microsoft 365 tenant and requires a method to migrate user data seamlessly.
Observed behavior: Native Cross-Tenant User Data Migration is blocked because it requires Enterprise Agreement licensing and global administrator permissions on both tenants.

Before you start

Verify your current Microsoft 365 licensing status and check with your source organization's IT department to confirm if manual PST exports are permitted by policy.

Solution 1Recommended

Export and Import Data via PST File

Manually export your mailbox data using the Outlook desktop client, which bypasses the need for tenant-level administrator privileges.

If your organization does not have an Enterprise Agreement for automated cross-tenant migration, utilizing the Outlook desktop client to create a local backup is the most reliable self-service method.

Open Outlook Export Settings

Launch the Outlook desktop client logged into your original tenant account. Navigate to 'File', select 'Open & Export', and then click 'Import/Export'.

Export to a File

In the wizard, choose 'Export to a file' and click Next. Select 'Outlook Data File (.pst)' and click Next.

Select Mailbox and Calendars

Select the top-level folder of your mailbox (usually your email address) and ensure 'Include subfolders' is checked so that both emails and calendars are exported. Save the file to your local drive.

Import to the New Tenant

Add your new Microsoft 365 tenant account to Outlook. Return to the Import/Export wizard, choose 'Import from another program or file', select your saved PST file, and import it into the new account.

Sync Time: Depending on the size of your mailbox, the initial sync to upload the imported PST data to the new Microsoft 365 servers may take several hours.

Solution 2

Consult Microsoft FastTrack Support

Reach out to Microsoft specialists for guidance on alternative migration paths when EA licensing is unavailable.

Free Microsoft Office alternative

Switch to WPS Office for a Cost-Effective Productivity Solution

If your organization is separating tenants to reduce overhead or simplify licensing, WPS Office offers a lightweight, highly compatible alternative to Microsoft Office. Ensure your teams stay productive without the burden of expensive Enterprise Agreements.

1. Download and Install: Visit the official WPS Office website and download the free installer for your operating system.
2. Open Existing Documents: Launch WPS Office and open your existing Microsoft Office files directly; no format conversion is required.
3. Work Seamlessly: Continue editing your documents, spreadsheets, and presentations using a familiar interface while saving on licensing costs.

Highly compatible with Microsoft Word, Excel, and PowerPoint formats (.docx, .xlsx, .pptx).Cost-effective solution eliminating the need for expensive enterprise subscription agreements.Lightweight application with a familiar, easy-to-use tabbed interface.Built-in robust PDF editing and seamless cross-platform cloud collaboration features.

microsoft office alternative - wps office

Frequently Asked Questions

Can I perform a cross-tenant migration without administrator privileges?

Automated server-side cross-tenant migrations require global or Exchange administrator privileges on both the source and target tenants. Users without these rights must rely on manual client-side PST exports or seek assistance from their IT administrators.

Do I absolutely need an Enterprise Agreement for tenant migration?

Microsoft's native Cross-Tenant User Data Migration tool typically requires an Enterprise Agreement. Organizations without an EA usually rely on manual export/import methods or employ third-party migration software like BitTitan or ShareGate.

Will exporting to a PST file save my calendar events and meetings?

Yes. When you export your data to a PST file in Outlook, you can choose to include your calendar folder. This will capture all your meetings, appointments, and scheduled events for import into the new tenant.

Are there third-party alternatives for migrating Microsoft 365 mailboxes?

Yes, many organizations use specialized third-party tools designed for cross-tenant migrations. These tools bypass the need for Microsoft Enterprise Agreements, though they still require appropriate administrative access to configure source and destination endpoints.

Migration & Recovery