Login attempts result in this error code

Question

Login attempts result in this error code

Laura 0


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

Ryan-N 16,095 Reputation points Microsoft External Staff Moderator

2026-09-29T20:08:44.24+00:00

Hi Laura,

I wanted to follow up and check whether the information I previously provided has helped resolve the issue you were experiencing.

If you have any updates regarding the issue or if anything remains unclear, please don't hesitate to let me know. Feel free to share any additional information with me. I am always happy to listen and provide further assistance whenever needed.

I look forward to hearing from you soon.

Kind regards,

1 answer

Your answer

Ryan-N 16,095 Reputation points Microsoft External Staff Moderator

2026-09-29T20:08:44.24+00:00

Hi Laura,

I wanted to follow up and check whether the information I previously provided has helped resolve the issue you were experiencing.

If you have any updates regarding the issue or if anything remains unclear, please don't hesitate to let me know. Feel free to share any additional information with me. I am always happy to listen and provide further assistance whenever needed.

I look forward to hearing from you soon.

Kind regards,

Answer 1

Hi Laura,

Welcome to the Microsoft Q&A forum.

Based on the error code you provided, the user account currently does not have a mailbox and has not been assigned a license.

In this case, I recommend contacting your tenant's Global Administrator, who is typically part of your organization's IT department, to help check your license status and assign the appropriate license to your account.

After successfully contacting your administrator, please provide them with the following documentation for instructions on how to assign a license:

Assign or unassign licenses for users in the Microsoft 365 admin center - Microsoft 365 admin | Mic…

I hope this information is helpful.

If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.

I look forward to continuing the conversation.

If the answer is helpful, please click "Yes" and kindly upvote it.

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.