How to Migrate SharePoint from One Tenant to Another

Migrating data between tenants in Microsoft SharePoint is a complex but common requirement during mergers, acquisitions, or organizational restructuring. If not done correctly, it can lead to data loss, broken permissions, or downtime.

In this guide, I’ll walk you through exact methods, challenges, and best practices to successfully migrate SharePoint from one tenant to another.

What is SharePoint Tenant-to-Tenant Migration?

A SharePoint tenant-to-tenant migration involves transferring:

SharePoint sites

Document libraries

Lists and metadata

Permissions and user mappings

from a source tenant to a target tenant within Microsoft 365.

When Do You Need SharePoint Tenant Migration?

You typically need this migration in scenarios like:

Company mergers or acquisitions

Rebranding or domain changes

Data consolidation across multiple tenants

Divestitures or business separation

Pre-Migration Checklist (Must Do Before Starting)

Before you jump into migration, I strongly recommend preparing your environment:

1. Audit Existing SharePoint Data

Identify active vs inactive sites

Remove redundant or obsolete data

Check storage usage

2. Analyze Permissions

Document current permission structure

Identify external users

Plan user mapping between tenants

3. Prepare Target Tenant

Create users in target tenant

Assign licenses

Configure SharePoint environment

4. Backup Data

Always take a backup to avoid accidental loss.

Methods to Migrate SharePoint from One Tenant to Another

There are three main approaches, each with its own pros and limitations.

Method 1: Manual Migration (Download & Upload)

Steps:

Go to source SharePoint site

Open document library

Select files/folders

Click Download

Save locally

Open target SharePoint tenant

Upload files to new site

Limitations:

No metadata preservation

Permissions are not retained

Time-consuming for large data

Not scalable

👉 Best for: Small migrations only

Method 2: OneDrive Sync Method

This method uses OneDrive as an intermediate layer.

Steps:

Sync SharePoint library to local system

Wait for files to download

Connect target tenant

Upload synced files

Pros:

Easier than manual download

Handles larger data sets

Cons:

Still loses metadata

Permissions not migrated

Sync errors possible

👉 Best for: Medium-sized environments

Method 3: PowerShell-Based Migration

Using PowerShell scripts with SharePoint Online Management Shell.

Steps Overview:

Connect to source tenant:

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

Export site structure and content

Connect to target tenant:

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

Recreate sites and upload content

Challenges:

Requires scripting expertise

No full metadata or permission migration

High risk of errors

👉 Best for: Advanced users and developers

Common SharePoint Migration Challenges

From my experience, these are the most common issues:

Data loss during transfer

Broken permissions and access control

Metadata not preserved

Large file size limitations

URL structure changes

Downtime affecting users

How Professional Tools Simplify Migration

Manual and script-based methods have serious limitations. This is where professional tools come in.

A tool like SysTools SharePoint Migrator can:

Migrate entire sites, libraries, and lists

Preserve metadata and permissions

Support incremental migration

Map users automatically

Reduce downtime

This is the most reliable approach for enterprise-level migration.

Step-by-Step Using a Professional Tool (Recommended Approach)

1. Install and Launch Tool

Set up migration software on your system

2. Add Source Tenant

Enter admin credentials

Validate permissions

3. Add Target Tenant

Provide target admin details

4. Configure Migration

Select sites and libraries

Apply filters if needed

5. Map Users

Match source users to target users

6. Start Migration

Monitor progress in dashboard

7. Validate Migration

Check files, metadata, and permissions

Best Practices for SharePoint Tenant Migration

Always run a pilot migration first

Clean up unnecessary data before migration

Maintain proper user mapping

Test permissions after migration

Schedule migration during off-hours

Keep stakeholders informed

Maintain backup until validation is complete

Real-Life Example

I’ve seen organizations fail migrations because they relied on manual methods for large datasets. In one case, over 30% of metadata was lost, leading to compliance issues.

After switching to a professional tool, the migration was completed with zero data loss and accurate permissions mapping.

FAQs

1. Can I migrate SharePoint without downtime?

Yes, using incremental migration tools.

2. Will permissions be preserved?

Not in manual methods—only professional tools ensure this.

3. How long does migration take?

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

4. Is PowerShell enough for migration?

Only for basic tasks—not ideal for full migration.

5. What is the safest method?

Using a reliable third-party migration tool.

Conclusion

Migrating SharePoint from one tenant to another isn’t just about moving files—it’s about preserving structure, permissions, and business continuity.

While manual and PowerShell methods can work for small setups, they fall short in real-world enterprise scenarios. Based on practical experience, using a professional migration tool is the most efficient and risk-free approach.