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How to Fix UserHasNoMailboxAndNoLicenseAssignedError in Microsoft 365
Question details
The user is unable to access their Microsoft 365 services due to a mailbox or license assignment error.
- Product
- Microsoft 365 / Exchange Online
- Device & OS
- not provided
- Scenario
- Attempting to sign in to Outlook or other Microsoft 365 cloud services that require an active email account.
- Observed behavior
- The system displays the UserHasNoMailboxAndNoLicenseAssignedError, preventing the user from accessing their mailbox or related applications.
Ensure you have Microsoft 365 administrator privileges, as resolving this licensing error requires access to the Microsoft 365 admin center.
Verify and Assign an Exchange Online License
Use the Microsoft 365 admin center to check and assign the proper license to the affected user account.
The most common cause of this error is that the account has not been granted a license that includes Exchange Online, which is necessary for mailbox creation.
Sign in to the Microsoft 365 admin center using an account with administrator credentials.
Navigate to the 'Users' menu on the left sidebar and select 'Active users'. Search for the affected account and click on their display name.
In the user properties panel, click on the 'Licenses and apps' tab. Ensure that a valid Microsoft 365 license is assigned.
Scroll down and expand the 'Apps' section. Verify that the checkbox next to 'Exchange Online' is checked, then click 'Save changes'.
Refresh Your Sign-In Session
Force the application to fetch updated license information if the license was recently applied by an admin.
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Frequently Asked Questions
Why am I seeing the UserHasNoMailboxAndNoLicenseAssignedError?
This error is triggered when the system detects that your Microsoft 365 account does not have a license that includes Exchange Online, meaning no mailbox exists for your account to use.
Can I fix this error if I am not an administrator?
No, standard users cannot assign licenses to themselves. You will need to contact your organization's IT support or Microsoft 365 administrator to have the correct license assigned to your account.
How long does it take for a mailbox to work after a license is assigned?
Normally, mailbox provisioning takes 15 to 30 minutes after an admin assigns the Exchange Online license. However, during peak times or system delays, it can occasionally take up to 24 hours.
