How to Recover an Unlicensed User's Mailbox in Microsoft 365
Question details
The user needs to recover or access the mailbox data of a Microsoft 365 account that has had its license removed.
- Product
- Microsoft 365 Exchange Online
- Device & OS
- not provided
- Scenario
- A Microsoft 365 license has been removed from a user, and their Exchange Online mailbox data needs to be recovered before permanent deletion.
- Observed behavior
- The mailbox enters a 30-day grace period after license removal, during which data can still be recovered or preserved using retention policies.
Verify the exact date the Microsoft 365 license was removed to ensure the mailbox is still within the 30-day recovery grace period.
Reassign a License to Recover the Mailbox
The easiest way to restore an unlicensed mailbox within the 30-day grace period is to reassign an Exchange Online license to the user.
When a license is removed, Microsoft 365 retains the mailbox data for exactly 30 days. By reassigning the license within this window, the mailbox is fully restored with all its previous emails, contacts, and calendar items intact.
Go to the Microsoft 365 admin center and log in using your global administrator or user management administrator credentials.
On the left-hand navigation pane, click on 'Users' and then select 'Active users'.
Locate and click on the name of the user whose mailbox you wish to recover. A properties pane will slide out on the right.
Click on the 'Licenses and apps' tab, check the box next to the appropriate Exchange Online or Microsoft 365 license, and click 'Save changes'.
Recover Data via Content Search and eDiscovery
If the user was unlicensed but their mailbox was placed under a retention policy or litigation hold, you can recover the preserved data using eDiscovery.
Manage Your Exported Documents and Reports with WPS Office
While recovering Microsoft 365 mailboxes requires admin center access, you often need to open, manage, and edit exported PST reports and recovered document attachments. WPS Office is the perfect lightweight, free alternative to Microsoft Office, offering full compatibility with Word, Excel, and PowerPoint formats without the expensive subscription.
- 1. Download WPS Office: Visit the official WPS website to download and install the free WPS Office suite on your device.
- 2. Open Recovered Files: Launch WPS Office and seamlessly open any exported documents or reports associated with your email recovery process.
- 3. Edit and Save: Use the familiar interface to edit your files and save them in standard Microsoft formats for easy sharing.
Frequently Asked Questions
What happens to a Microsoft 365 mailbox when a license is removed?
When an Exchange Online license is removed, the mailbox enters a 30-day grace period. During this time, the data is retained and can be fully restored by reassigning a license. After 30 days, the data is permanently deleted unless preserved by a retention policy.
Can I recover an unlicensed mailbox after 30 days?
Generally, no. Once the 30-day grace period expires, the mailbox data is permanently purged. However, if a retention policy, retention label, or Litigation Hold was actively applied to the mailbox before the license was removed, administrators can still search and recover the data using eDiscovery.
Do I need to pay for another license just to recover emails?
To directly log into and use the mailbox again, you must temporarily assign an active license. A cost-effective alternative before removing a license is to convert the user's mailbox into a Shared Mailbox, which allows you to access the historical data for free without requiring a paid license.
