I cannot open outlook email

Question

I cannot open outlook email

Vanessa Bernados 20

it says:

UTC Date: PII REMOVED

Client Id: PII REMOVED

Session Id: PII REMOVED

Client Version: PII REMOVED

BootResult: configuration

Back Filled Errors: Unhandled Rejection: Error: 500:undefined|undefined:undefined

err: Microsoft.Exchange.Clients.Owa2.Server.Core.OwaUserHasNoMailboxAndNoLicenseAssignedException

esrc: StartUpData

et: ServerError

estack: Error: 500

 at Object.w [as createStatusErrorMessage] (PII REMOVED)

 at  PII REMOVED
```st:500

ehk: X-OWA-Error

efe:  PII REMOVED

emsg: UserHasNoMailboxAndNoLicenseAssignedError

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Answer 1

Hello @Vanessa Bernados,

Thank you for posting to Microsoft Q&A Forum! We are happy to assist you.

To understand the situation and be able to offer you relevant suggestions, we would need a little more information from you. Kindly help us in providing the following information.

May I double confirm that you checked with Admin if your account still has License? To check this kindly sing into https://admin.microsoft.com/ with Admin credentials --> choose Active User under Users --> click on your username --> choose Licenses and apps -->Expand Apps --> Make sure that Exchange Online (Plan1 or 2) is selected. If your account has License kindly uncheck it and reapply it, then wait the sync period to see if it will make any difference User's image

User's image

If you don't have Admin privilege, kindly contact your organization Admin to check above for you.

You may also refer to Getting a mailbox not found error in Outlook on the web - Microsoft 365 admin | Microsoft Learn.

If the issue still present, you may also (use admin account to) go to Office 365 Admin Center -> Support -> New Service Request. The support engineers there have the correct escalation channel, and this is the most efficient way to report such issue. You can refer to this article to check the way how to raise a ticket: Ways to contact support for business products - Admin help. The engineers in related team have higher permission and resources than us to help check the root cause from background directly.

We look forward to your response. Kindly note that the above requested information is required for further analysis and troubleshooting of your situation. Your patience and cooperation are much appreciated. Have a nice day!

Best regards,

If this response has been helpful, we kindly encourage you to mark it as "Accept Answer". Doing so will assist other users with similar questions in finding accurate and timely solutions more easily.

We appreciate your participation in the community and look forward to supporting you further.

If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. User's image

Vicky-I 6,345 Reputation points Microsoft External Staff Moderator

2025-10-29T15:01:57.2533333+00:00

Hello @Vanessa Bernados,

Just checking in to see if the above information was helpful. If you have any further updates on this issue, please feel free to post back.

At last, if the information we provided give some direction for the issue, please click "Accept Answer" and kindly upvote it, with your vote, other users who are facing same query can easily find this thread and check suggestion when they search on community. Your vote helps other user to resolve their queries.

Warm thanks.