File Sharing Problems

How to Share OneDrive Files Between Microsoft 365 Tenants

Aamir Naveed Akram Oct 7, 2026 869 views

Question details

The user needs to securely share and collaborate on files hosted in OneDrive or SharePoint with external users located in a different Microsoft 365 tenant organization.

How to Share OneDrive Files Between Microsoft 365 Tenants

Product: OneDrive / SharePoint
Device & OS: not provided
Scenario: Collaborating with external partners or non-profit organizations by sharing cloud documents across different Microsoft 365 organizations.
Observed behavior: Cross-tenant sharing requires proper guest access setup, specific sharing link configurations, and correct authentication credentials (handling domains like onmicrosoft.com or reseller setups) to prevent access errors.

Before you start

Ensure that you have the exact Microsoft 365 email address of the external recipient and that your organization's IT administrator has enabled external guest sharing for OneDrive and SharePoint.

Solution 1Recommended

Generate a Specific-People Sharing Link

The most secure and reliable method to share files externally across tenants is by explicitly inviting the recipient through a specific-people link.

Anonymous 'Anyone' links are frequently blocked by organizational tenant policies for security reasons. Using a 'Specific people' link ensures that the external recipient must authenticate with their Microsoft 365 account, validating their identity and bypassing many standard access restrictions.

Select the file or folder

Locate the file in your OneDrive or SharePoint library, right-click it, and select Share.

Adjust link settings

Click on the default sharing link setting (which often says 'Anyone with the link can edit') to open the Link settings menu. Select 'Specific people' from the options.

Set permissions and apply

Check 'Allow editing' if the recipient needs to modify the document, then click Apply.

Send the invitation

Enter the recipient's exact Microsoft 365 email address, add an optional message, and click Send. The recipient will receive an email invitation to access the file.

Authentication Tip: If the recipient organization uses an initial domain (like name.onmicrosoft.com) as their primary authentication, ensure you send the invitation to that specific alias to avoid sign-in errors.

Solution 2

Sync External SharePoint Libraries to Your Local OneDrive

If an external organization shares a SharePoint folder with you, you can sync it locally without duplicating files across both tenants.

Solution 3

Verify Guest Account Settings in Admin Center

For administrators, resolving persistent authentication failures requires verifying the guest account sign-in names, aliases, and reseller policies.

Free Microsoft Office alternative

Enhance Your Document Collaboration with WPS Office

While managing Microsoft 365 cross-tenant sharing policies can be complex, WPS Office offers a free, lightweight, and highly compatible alternative. You can easily create, edit, and share documents with external partners without worrying about restrictive tenant permissions.

1. Download the software: Visit the official WPS Office website and click on the Free Download button.
2. Install WPS Office: Run the downloaded installer and follow the on-screen prompts to set up the suite on your device.
3. Share effortlessly: Open your documents and share them instantly using built-in cloud links or as email attachments without worrying about complex tenant policies.

Fully compatible with Microsoft Office file formats, including .docx, .xlsx, and .pptx.Seamlessly integrates with third-party cloud drives like Google Drive and Dropbox for frictionless cross-organization sharing.Free to use with a lightweight installation that runs smoothly on older devices.Familiar user interface requiring no learning curve for users migrating from Microsoft Office.

microsoft office alternative - wps office

Frequently Asked Questions

Can I open a cross-tenant shared file in my desktop Office application?

Yes, provided you have been granted edit permissions, your account is properly authenticated as a guest, and the host tenant's conditional access or sensitivity settings permit desktop application access.

Why does my external sharing link fail when the recipient tries to open it?

This commonly happens if the link was set to 'Anyone' and blocked by the host's tenant policies, or if the recipient is signing in with a different alias than the one invited. Ensure you use 'Specific people' links and that they authenticate with the exact invited email address.

Can I sign in to multiple work accounts on the same OneDrive desktop client?

Yes, the OneDrive desktop client supports adding multiple work or school accounts. However, each account will sync to a completely separate local folder on your computer.

What is an onmicrosoft.com domain and do I need to use it for sharing?

It is the initial default domain assigned to a Microsoft 365 tenant. In some configurations—especially for non-profits or reseller-managed tenants—this domain might still act as the primary sign-in name or required authentication address for external users.

Document & File Issues