Outlook Error Codes

How to Fix Outlook Webmail Error in Microsoft Edge but Not Chrome

Elise Williams Oct 20, 2026 869 views

Question details

A user is experiencing a specific mailbox and license error when attempting to load Outlook Webmail in Microsoft Edge, despite the account functioning correctly in Google Chrome.

How to Fix Outlook Webmail Error in Microsoft Edge (UserHasNoMailboxAndNoLicenseAssignedError)

Product: Outlook Webmail
Device & OS: not provided
Scenario: Accessing an Exchange Online email account via a web browser.
Observed behavior: Outlook throws a 'UserHasNoMailboxAndNoLicenseAssignedError' in Microsoft Edge on a specific computer. However, the same account works perfectly in Chrome, on other computers, and for other users on the affected device.

Before you start

Ensure you have your Microsoft account credentials readily available, as you will need to sign back into Outlook Webmail after clearing your browser data and sessions.

Solution 1Recommended

Test in InPrivate Browsing and Clear Edge Cache

Since the issue is isolated to Microsoft Edge, the error is likely caused by cached credentials or a corrupted browser session. Clearing this data resolves the conflict.

When an Exchange Online license error occurs in only one specific browser, it indicates that the browser is attempting to pass an old, incorrect, or corrupted login token to the server.

Open an InPrivate Window

Launch Microsoft Edge and press Ctrl + Shift + N to open an InPrivate browsing window. Navigate to Outlook Webmail and attempt to sign in.

Verify Account Access

If Outlook Webmail loads successfully in the InPrivate window without the license error, it confirms that your normal browser cache is the root cause of the issue.

Clear Browser Cache and Cookies

Close the InPrivate window. In your normal Edge browser, click the three dots (Menu) in the top right, go to Settings, and navigate to 'Privacy, search, and services'.

Execute Data Clearing

Under 'Clear browsing data', click 'Choose what to clear'. Select 'Cookies and other site data' and 'Cached images and files', then click the 'Clear now' button.

Restart and Reconnect

Close Microsoft Edge completely. Reopen the browser, navigate to Outlook Webmail, and log in with your credentials.

Test in InPrivate Browsing and Clear Edge Cache

Temporary Workaround: While you are troubleshooting Microsoft Edge, you can continue to use Google Chrome to read and send your emails uninterrupted.

Solution 2

Remove Saved Account Profiles in Microsoft Edge

If clearing the cache does not resolve the issue, a corrupted Microsoft account profile saved directly to the Edge browser may be forcing an invalid login attempt.

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Frequently Asked Questions

What does the UserHasNoMailboxAndNoLicenseAssignedError mean?

This error means the server cannot find a valid Exchange Online license associated with the account trying to log in. When this happens only in one specific browser like Edge, it is typically a false error caused by an outdated or corrupted login token saved in the browser, rather than an actual missing license.

Why does Outlook Webmail work in Google Chrome but not in Microsoft Edge?

Browsers store their own independent cache, cookies, and session data. A corrupted cookie or a stuck automated login session in Microsoft Edge can cause it to pass incorrect credentials to the Microsoft server, triggering the error. Because Chrome uses a separate cache, it passes the correct, fresh credentials.

Will clearing my Microsoft Edge browser cache delete my emails?

No. Clearing your browser cache and cookies only removes temporary files, saved website preferences, and login session data stored on your local computer. Your emails, contacts, and calendar events are securely stored on Microsoft's Exchange servers and will not be affected.

Microsoft Office Error Codes