OneDrive Cross-Tenant Migration: Best Practices for IT Admins

What is OneDrive to OneDrive Migration?

OneDrive T2T Migration is the process of moving user OneDrive data from one Microsoft 365 tenant to another without manually downloading and uploading files. A Microsoft 365 tenant is a dedicated environment that contains an organization’s users, applications, SharePoint sites, Exchange services, and OneDrive accounts.

During migration: Source Microsoft 365 Tenant -> User OneDrive Account -> Files, folders, and user content -> Destination Microsoft 365 Tenant -> New OneDrive Account. The migration transfers eligible OneDrive content from the source tenant to the target tenant. After completion, users access their files from the new tenant environment.

Why Do Organizations Need OneDrive Cross-Tenant Migration?

• Mergers and Acquisitions: When two companies combine, they often need to move users and their OneDrive data into a single Microsoft 365 environment.
• Company Divestitures: During business separation, selected users may need to move from one Microsoft 365 tenant to another.
• Tenant Consolidation: Large organizations sometimes maintain multiple Microsoft 365 tenants due to previous acquisitions or independent departments.
• Domain or Identity Changes: Organizations changing their business domain or Microsoft 365 structure may migrate OneDrive data to align user accounts with the new environment.

Microsoft Native: Migrate OneDrive from One Tenant to Another

Microsoft provides a native method to migrate OneDrive data between Microsoft 365 tenants. The migration process generally includes:

Step 01: Prepare Source and Target Tenants

Before starting migration, administrators must prepare both environments. Required preparation includes:

• Verify Microsoft 365 tenant configuration
• Assign required licenses
• Create target user accounts
• Ensure proper administrator permissions

Step 02: Establish Tenant Relationship

The source and target Microsoft 365 tenants must establish a migration relationship. This allows Microsoft 365 environments to communicate securely during the migration process.

Step 03: Map Source Users with Target Users

User mapping connects the existing OneDrive account in the source tenant with the correct account in the target tenant. Example: Source Tenant john@companyold.com -> Target Tenant john@companynew.com. Accurate identity mapping ensures that files are transferred to the correct users.

Step 04: Start OneDrive Migration

After configuration, administrators can start the OneDrive migration process. The migration transfers eligible OneDrive content from the source tenant to the destination tenant while maintaining file structure.

Challenges During Manual OneDrive Cross-Tenant Migration

• User Identity Mapping Issues: Incorrect user mapping can transfer data to the wrong destination account or cause migration failures.
• Large Data Volume: Organizations with hundreds of users may have terabytes of OneDrive data. Managing large-scale migration requires proper scheduling and monitoring.
• Microsoft’s native migration approach works well for supported scenarios, but organizations may require additional options such as date-based filtering, File-type filtering, Incremental migration, Detailed reports, and Multiple workload migration.

For complex migrations, a professional migration tool can provide additional flexibility.

O365 Tenant to Tenant Migration Tool for OneDrive Migration

The DRS Softech Office 365 Tenant to Tenant Migration Tool provides an efficient solution to migrate OneDrive data between Microsoft 365 tenants. It helps IT administrators migrate multiple OneDrive accounts securely without complicated manual configurations. All Files and the latest version (updated files) are migrated. Folder and file hierarchy is fully preserved. Migration is performed using the latest Microsoft Graph API.

Apart from that, you can perform Mailbox Migration, SharePoint Migration, Email Deduplication, OneDrive Deduplication, and SharePoint Deduplication. Offer several features, like Skip Previously Migrated Data, Date Filter, File Extension, Custom Folder, File Size Filter, and more. Live Monitoring Migration Reports. Free version of this tool is available to migrate 500 emails/folder, 100 contacts/calendars. 

Steps to Perform OneDrive for Business Migration?

1. Download and install the DRS Softech Cross-Tenant Migration Tool. Click OneDrive Migration.
2. Authenticate the source Microsoft 365 tenants using Modern Authentication or Admin Impersonation (Azure App Registration).
   
3. Choose the OneDrive accounts you want to migrate. Click Next.
4. Then, Connect Destination Microsoft 365 by using Modern Authentication or Admin Impersonation. Select Destination OneDrive Accounts.
5. Map source and destination users. Use Quick Actions and View Mapping options also.
6. Apply features and click Start to begin the migration or deduplication process.

Microsoft 365 Tenant to Tenant Migration Tool: Major Benefits

• Bulk OneDrive Migration: Migrate multiple OneDrive accounts simultaneously instead of migrating users individually. 
• Preserve File and Folder Hierarchy: The tool maintains the original OneDrive folder structure and file organization after migration.
• Latest Version Migration: The tool migrates the latest versions of updated files to ensure users receive the most recent data.
• Skip Previously Migrated Data: It migrates only the remaining or newly added data, saving time, reducing bandwidth usage, and preventing duplicate migration.
• OneDrive Deduplication helps identify and remove duplicate files from OneDrive for Business accounts. It uses hash-based scanning to find duplicate files accurately.

Conclusion

OneDrive Cross-Tenant Migration is an essential process to migrate OneDrive data between Microsoft 365 tenants due to mergers, acquisitions, tenant consolidation, or business restructuring. Microsoft provides a native approach for supported scenarios, but complex migration projects often require additional flexibility and control. The DRS Softech Office 365 Tenant to Tenant Migration Tool simplifies OneDrive -> OneDrive migration by supporting bulk migration, simple interface overview, and more.

Frequently Asked Questions