How to Move Word File Between Office 365 Tenants

When you switch employers or merge companies, you often need to move Word documents from one Office 365 tenant to another. Direct drag-and-drop between tenants does not work because each tenant is a separate cloud environment with its own permissions and storage. This article explains three reliable methods to transfer Word files between tenants: downloading and re-uploading, using SharePoint migration tools, and using Microsoft 365 Groups or Teams cross-tenant sharing. You will learn the exact steps for each method and how to avoid common permission and formatting issues.

Why You Cannot Simply Drag Files Between Tenants

Office 365 tenants are isolated cloud domains. Each tenant has its own Azure Active Directory, SharePoint sites, and OneDrive storage. When you open Word from one tenant, it only sees files stored in that tenant’s SharePoint or OneDrive. There is no built-in cross-tenant file picker in Word. Attempting to copy a link from one tenant and paste it into another tenant’s Word Online will result in a permission error. The only way to move the actual file content is to transfer the file outside the tenant boundary, either by downloading it or by using a migration tool that can authenticate to both tenants.

Method 1: Download and Re-Upload the Word File

This method works best for a single file or a small batch of files. It requires no additional software and can be done in a few minutes per file.

1. Open the file in the source tenant
   Sign in to Office 365 with your source tenant account. Navigate to the SharePoint document library or OneDrive folder that contains the Word file. Click the file to open it in Word Online.
2. Download the file to your local computer
   In Word Online, click File > Save As > Download a Copy. Alternatively, go back to the document library, select the file, and click Download in the toolbar. The file saves to your default Downloads folder as a .docx file.
3. Sign in to the target tenant
   Open a new browser tab or private window. Sign in to Office 365 with your target tenant account. Navigate to the SharePoint site or OneDrive folder where you want to store the file.
4. Upload the file to the target tenant
   In the target document library, click Upload > Files. Select the downloaded .docx file from your computer. The file uploads and becomes available in the target tenant.
5. Open and verify the file
   Click the uploaded file to open it in Word Online or Word desktop. Check that all content, formatting, and embedded objects appear correctly. If the file contains macros or ActiveX controls, you may need to enable them in the target tenant’s Trust Center settings.

Method 2: Use the SharePoint Migration Tool for Bulk Transfers

If you need to move dozens or hundreds of Word files, the SharePoint Migration Tool (SPMT) is the recommended approach. SPMT can connect to both tenants and copy files while preserving folder structure and some metadata. You must have Global Admin or SharePoint Admin permissions in both tenants.

1. Download and install SPMT
   Go to the Microsoft Download Center and search for SharePoint Migration Tool. Download and install the latest version on a Windows 10 or Windows 11 computer that has internet access.
2. Add the source tenant as a source
   Open SPMT. On the welcome screen, click Get Started. Choose SharePoint as the source type. Enter the source tenant’s SharePoint site URL and sign in with your source tenant credentials. SPMT will display the document libraries available on that site.
3. Select the Word files to migrate
   Browse the source document library and check the boxes next to the Word files or folders you want to move. You can also use the filter option to show only .docx files.
4. Add the target tenant as the destination
   Click Next. Choose SharePoint as the destination type. Enter the target tenant’s SharePoint site URL and sign in with your target tenant credentials. Select the destination document library and folder.
5. Configure migration settings
   SPMT will ask if you want to preserve file version history. For Word files, preserving only the latest version is usually sufficient. You can also choose to keep file permissions, but this requires that user accounts exist in both tenants. Click Start Migration.
6. Monitor the migration
   SPMT shows a progress bar and a log of each file transferred. When the migration completes, review the summary for any errors. Common errors include files that are locked or exceed the 250 MB file size limit. Resolve errors by unlocking files or splitting large documents.

Method 3: Cross-Tenant Sharing via SharePoint Guest Access

If you do not need to permanently move the file, you can share it across tenants using SharePoint’s external sharing feature. This method keeps the file in the source tenant but allows users in the target tenant to view and edit it.

1. Enable external sharing in the source tenant
   Go to the SharePoint Admin Center in the source tenant. Under Policies > Sharing, ensure that external sharing is set to Allow sharing to authenticated external users. Apply this setting to the specific site that contains the Word file.
2. Share the file with a guest user from the target tenant
   Navigate to the source tenant’s document library. Select the Word file and click Share. Enter the email address of the user in the target tenant. Set permissions to Can Edit or Can View. Click Send. The target user receives an email with a link.
3. Target user opens the file
   The target user clicks the link and signs in with their target tenant credentials. Word Online opens the file from the source tenant. The user can edit the file, but changes are saved back to the source tenant.
4. Copy the file to the target tenant (optional)
   If the target user needs a permanent copy, they can download the file from Word Online (File > Save As > Download a Copy) and then upload it to their own tenant using Method 1.

Common Problems When Moving Word Files Between Tenants

Permission errors when opening the file in the target tenant

This occurs when you try to open a file that was shared via a direct link from the source tenant without giving the target user explicit access. Always use the Share button and send the invitation to the target user’s email address. Do not copy the URL from the browser address bar.

Formatting changes after re-upload

Some formatting elements, such as custom fonts not installed in the target tenant’s Office environment, may change. To avoid this, embed fonts in the Word file before downloading. In Word desktop, go to File > Options > Save and check Embed fonts in the file. Choose Embed only the characters used in the document to keep the file size small.

Large files fail to upload

Word files larger than 250 MB cannot be uploaded to SharePoint Online or OneDrive through the browser. Use SPMT for large files, or compress the file by reducing image resolution. In Word, select any image, go to Picture Format > Compress Pictures, and choose Email (96 ppi) for the smallest file size.

Version history is lost after download and re-upload

When you download a file and re-upload it, only the latest version is transferred. If you need version history, use SPMT with the Preserve versions option. Note that SPMT can preserve up to 500 versions, but the target tenant must have versioning enabled on the document library.

Download vs SPMT vs Cross-Tenant Sharing: Which Method to Use

Item	Download and Re-Upload	SharePoint Migration Tool	Cross-Tenant Sharing
Number of files	1 to 10 files	10 to thousands of files	Any, but files stay in source tenant
Permissions required	Edit access in both tenants	SharePoint Admin in both tenants	External sharing enabled in source tenant
Preserves version history	No	Yes, up to 500 versions	Not applicable
Preserves metadata	No	Yes, including columns and tags	Not applicable
Requires local computer	Yes	Yes	No
Best for	Quick one-off transfers	Bulk migration projects	Temporary cross-tenant collaboration

After moving your Word files, open each document in the target tenant and verify that links to other files still work. Relative links within the same document library should remain intact, but absolute links that point to the source tenant’s URL will break. Use Word’s Edit Links to Files feature (File > Info > Edit Links to Files) to update any broken external references. For long-term management, consider setting up a cross-tenant trust relationship using Azure AD B2B collaboration, which allows seamless access to SharePoint sites across tenants without moving files.