License & Subscription Issues

How to Use OneDrive with a Shared Mailbox in Microsoft 365

Maira Mehtab Sep 20, 2026 868 views

Question details

The user needs to know how to create or access OneDrive storage using a shared mailbox account.

Product: Microsoft 365
Device & OS: not provided
Scenario: Attempting to use OneDrive cloud storage associated with a shared mailbox for file management.
Observed behavior: Shared mailboxes are unlicensed by default and therefore do not include OneDrive storage out of the box.

Before you start

Ensure you have global or billing administrator privileges in the Microsoft 365 Admin Center and that you have an available license that includes the OneDrive service.

Solution 1Recommended

Assign a Microsoft 365 License to the Shared Mailbox

Assigning a standard Microsoft 365 license to the shared mailbox will instantly provision it with OneDrive cloud storage.

By default, shared mailboxes in Microsoft 365 are designed only for email management and do not require a paid license. Because they are unlicensed, they lack supplementary services like OneDrive.

To enable OneDrive for a shared mailbox, you must allocate a license that includes the OneDrive service to the account.

Access the Admin Center

Navigate to Licenses

In the left-hand navigation menu, go to the 'Billing' section and select 'Licenses'.

Select the Product

Click on the appropriate Microsoft 365 product subscription that includes the OneDrive service.

Assign the License

Choose 'Assign licenses', then search for and select the specific shared mailbox account.

Configure and Finalize

Configure any additional services if prompted, and click 'Assign' to apply the license.

Provisioning Time: It may take a short time for the OneDrive storage to be fully provisioned after the license is assigned.

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Frequently Asked Questions

Why doesn't my shared mailbox have OneDrive by default?

Shared mailboxes are configured primarily for email reception and collaboration without requiring a dedicated user license. Because OneDrive requires an active user license, it is not included with unlicensed shared mailboxes.

Can I remove the license later if we no longer need OneDrive?

Yes, you can unassign the license in the Microsoft 365 Admin Center under Billing > Licenses. Note that removing the license will eventually result in the loss of access to the files stored in that OneDrive account.

Are there better alternatives to using a shared mailbox for file sharing?

Yes. Instead of purchasing a license just for a shared mailbox's OneDrive, it is usually recommended to use SharePoint Online document libraries or Microsoft Teams channels. These services are specifically designed for file collaboration among licensed team members without requiring extra licenses.

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