How to Migrate SharePoint Tenant to Another Tenant

Migrating a full SharePoint environment from one tenant to another is one of the most complex tasks in Microsoft SharePoint. It involves not just files, but sites, permissions, metadata, users, and integrations.

I’ve worked on multiple tenant migrations, and the biggest mistake organizations make is underestimating the planning phase. This guide will help you avoid that.

What is SharePoint Tenant-to-Tenant Migration?

A SharePoint tenant migration means transferring all SharePoint data from a source tenant to a target tenant within Microsoft 365.

It includes:

• SharePoint sites (Team & Communication)
• Document libraries and files
• Lists and metadata
• Permissions and user mappings
• Version history

When Do You Need Tenant Migration?

Typical business scenarios include:

• Mergers and acquisitions
• Company rebranding or domain change
• Tenant consolidation
• Business divestitures
• Compliance or data residency requirements

Pre-Migration Planning (Critical Phase)

From my experience, 70% of migration success depends on planning.

1. Inventory Your SharePoint Environment

• List all site collections
• Identify active vs inactive sites
• Analyze storage usage

2. Data Cleanup

• Remove obsolete content
• Archive unused sites
• Reduce migration volume

3. Identity & User Mapping

• Map source users to target users
• Handle guest/external users
• Sync identities via Azure AD

4. Permission Assessment

• Document unique permissions
• Identify broken inheritance

5. Backup Strategy

Always keep a secure backup before migration.

SharePoint Tenant Migration Methods

There are three main approaches, each suited for different needs.

Method 1: Manual Migration (Download & Upload)

Steps:

1. Access source SharePoint sites
2. Download document libraries
3. Store locally
4. Upload to target tenant
5. Recreate site structure manually

Limitations:

• No metadata preservation
• Permissions lost
• Extremely time-consuming
• Not feasible for large environments

👉 Best for: Very small migrations only

Method 2: PowerShell-Based Migration

Using admin tools like SharePoint Online Management Shell.

Steps Overview:

1. Connect to source tenant:

    

   Connect-SPOService -Url https://source-admin.sharepoint.com

    
2. Export site structure and content

3. Connect to target tenant:

    

   Connect-SPOService -Url https://target-admin.sharepoint.com

    
4. Recreate sites and import data

Pros:

• More control than manual method
• Script automation possible

Challenges:

• No full fidelity migration
• Complex scripting required
• Permissions & metadata issues

👉 Best for: Advanced admins

Method 3: Professional Migration Tool (Recommended)

For real-world enterprise migrations, this is the most reliable option.

What It Handles:

• Complete site migration
• Metadata and version history
• Permissions and user mapping
• Incremental/delta migration
• Scheduling and reporting

Step-by-Step Process:

1. Install Migration Tool

Set up software on a secure system

2. Add Source Tenant

• Enter admin credentials
• Validate access

3. Add Target Tenant

• Configure destination environment

4. Select Workloads

• Choose SharePoint sites
• Include lists, libraries, and pages

5. User Mapping

• Map users between tenants
• Resolve conflicts

6. Run Migration

• Start full or incremental migration
• Monitor progress

7. Validate Data

• Verify files, permissions, and metadata

👉 Best for: Medium to large organizations

Key Challenges in SharePoint Tenant Migration

These are the most common issues I’ve seen:

• Permission mismatches
• Missing metadata
• Broken links and URLs
• Large file size limits
• API throttling
• Version history loss
• Downtime risks

How Professional Tools Overcome These Challenges

A tool like the Enterprise-grade SharePoint Migration Tool addresses these problems by:

• Preserving permissions and metadata
• Handling large-scale migrations
• Supporting incremental migration
• Providing detailed reports
• Reducing manual errors

Best Practices for SharePoint Tenant Migration

• Start with a pilot migration
• Clean up unnecessary data
• Maintain a detailed migration plan
• Communicate with stakeholders
• Schedule during off-hours
• Validate after each phase
• Keep backup until final approval

Real-Life Insight

In one migration project, a company attempted a PowerShell-based approach for over 2 TB of SharePoint data. The result:

• Metadata loss
• Broken permissions
• Delays of several weeks

After switching to a professional migration tool, the process was completed smoothly with accurate data and minimal downtime.

FAQs

1. Can SharePoint tenants be merged directly?

No, there is no native “merge tenant” option.

2. Will permissions migrate automatically?

Only with advanced tools or proper mapping.

3. How long does migration take?

Depends on data size, network speed, and method used.

4. Is downtime required?

Not always—incremental migration can reduce downtime.

5. What is the safest approach?

Using a trusted migration tool.

Conclusion

Migrating SharePoint from one tenant to another is a high-stakes process that requires planning, the right tools, and careful execution.

Manual and PowerShell methods may work for small environments, but for business-critical data, they introduce unnecessary risks. Based on real-world experience, a professional migration solution is the safest and most efficient path.