Cant log into email

Question

Cant log into email

George O'Hara Motors 0

UTC Date: 2026-10-08T11:56:52.534Z
Client Id: [Moderator note: Personally Identifiable Information removed]
Session Id: [Moderator note: Personally Identifiable Information removed]
Client Version: 20260925004.10
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] (https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.6ac40b15.js:1:806)
    at https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.6ac40b15.js:1:192265
st: 500
ehk: X-OWA-Error
efe: [Moderator note: Personally Identifiable Information removed]
ewsver: [Moderator note: Personally Identifiable Information removed]
reqid: [Moderator note: Personally Identifiable Information removed]
cv: [Moderator note: Personally Identifiable Information removed]

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Answer 1

Demi Nguyen 2,505 Independent Advisor

Hello George O'Hara Motors,

Thank you for providing the diagnostic information.

The error shown in the screenshot, OwaUserHasNoMailboxAndNoLicenseAssignedException, indicates that Outlook on the web cannot find an Exchange mailbox or an Exchange Online license for the affected account.

Could you please confirm whether your Microsoft 365 administrator has already verified that your account still has a valid Exchange Online license?

If you have administrator access, please sign in to the Microsoft 365 admin center and go to: Users > Active users > select the affected user > Licenses and apps

Expand Apps and confirm that Exchange Online Plan 1 or Exchange Online Plan 2 is enabled under the assigned subscription.

User's image

If the correct license is assigned but the mailbox is still unavailable, the administrator may try turning the Exchange Online service off and assigning it again. Please perform this carefully and make sure the same valid license remains available. After reassigning the service, allow sufficient time for the mailbox and license changes to synchronize before testing Outlook on the web again.

Microsoft provides additional guidance for this error here: Getting a mailbox not found error in Outlook on the web | Microsoft Learn

If you do not have administrator permissions, please contact your organization’s Microsoft 365 administrator and ask them to perform these checks for you. If you are unsure who the administrator is, please refer to: How do I find my Microsoft 365 admin? | Microsoft Support

Please update me with the license status and confirm whether the mailbox appears in the Exchange admin center. This information will help determine whether the issue concerns license assignment or mailbox provisioning.

Kind regards,

George O'Hara Motors 0 Reputation points

2026-10-08T12:48:56.52+00:00

I have tried my admin log in but it says i dont have "permission to access this resource"
Demi Nguyen 2,505 Reputation points Independent Advisor

2026-10-08T14:19:03.18+00:00

Hi George O'Hara Motors,

The message “You don’t have permission to access this resource” indicates that the account you used does not have the required administrator role, or it may not be the correct administrator account for this Microsoft 365 organization.

If this account was provided to you by your employer or another organization, please contact the organization’s IT department or Microsoft 365 administrator. The administrator can check whether your account still has a valid license, whether Exchange Online is enabled, and whether a mailbox has been created for the account.

However, if you personally purchased and set up the Microsoft 365 subscription, please confirm this in your reply. In that case, the subscription may be associated with a different administrator account, possibly ending in onmicrosoft.com or your organization’s domain, and I can help you review the appropriate next steps.

Kind regards,
George O'Hara Motors 0 Reputation points

2026-10-08T14:35:22.3+00:00

Hi Demi, yes i personally purchased and set up the 365 subscription. I have tried all log in emails i have and can not log in.

I would appriciate your assistance.

Thanks
Demi Nguyen 2,505 Reputation points Independent Advisor

2026-10-08T15:02:09.17+00:00

Thank you for confirming that you personally purchased and set up the Microsoft 365 subscription.

Could you please confirm approximately when the subscription was purchased? Was it purchased recently, or has it been active for a longer period?

When a Microsoft 365 Business subscription is first set up, an administrator account is normally created. The sign-in address may use the default Microsoft domain or your company’s custom domain, for example:

@companyname.onmicrosoft.com or @companyname.com

Could you please check the original Microsoft welcome email, purchase confirmation, invoices, or any setup records to see whether an administrator username like this was provided? The email address used to receive invoices is not always the same account used to sign in to the Microsoft 365 admin center.

If you are certain that none of your available accounts can access the Admin Center, you will need to contact Microsoft Support and ask the frontline agent to create a support ticket for the Data Protection Team. This team has the required security procedures to verify your identity and ownership of the tenant before helping restore administrator access.

You can find the support telephone number for your country or region here: Customer service phone numbers | Microsoft Support

(When calling, you may first hear an introductory message lasting approximately 30 seconds, suggesting that you visit a support website. Please wait until the menu options are presented. You can then try pressing "1" as a business email user and "1" again for technical assistance)

I also recommend calling during business hours. In my experience, it can be difficult to get through to the correct support queue, and automated systems don't always work as expected. If you can't get through on your first try, I suggest trying again later or at a different time.

Kind regards,