Request to verify the existence and creation of a Microsoft tenant

Question

Request to verify the existence and creation of a Microsoft tenant

Martina Comune di Mandello del Lario 0

Hi

During a security assessment, our consultant identified the existence of the following tenant:

Tenant ID: [Moderator note: Personally Identifiable Information removed] (regione EU) - NameSpaceType: Managed - [Moderator note: Personally Identifiable Information removed] ([Moderator note: Personally Identifiable Information removed]): mandellolario.it - Dominio mandellolarioit.onmicrosoft.com associato allo stesso Tenant ID (verificabile con l'analoga richiesta su [Moderator note: Personally Identifiable Information removed]

However, we did not create or directly open this tenant.

We kindly ask you to verify the existence of this tenant and provide us with information regarding who created it, including any available details or references associated with its creation.

Thank you for your assistance.

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1 answer

Your answer

Answer 1

Doris V 1,865 Microsoft External Staff Moderator

Dear Martina Comune di Mandello del Lario,

Please understand that this forum is a public platform, and moderators will modify your question to cover your personal information in the description. Please notice to hide these personal or organization information next time you post error or some information to protect personal data.

Based on the information provided, the OpenID configuration endpoint indicates that the tenant does exist and that the default Microsoft domain mandellolarioit.onmicrosoft.com is associated with the Tenant ID you referenced.

However, this is a public community forum, and as a forum user, I do not have access to internal systems or tenant registration records. Therefore, I am unable to verify who created the tenant, when it was created, or which account was used during the tenant creation process.

If this tenant is believed to be associated with your organization, I recommend opening a support request with Microsoft Support. After validating ownership and authorization, the support team may be able to review any available tenant-related records and advise what information can be provided.

To submit ticket support, you can refer to this article Get support for Microsoft 365 for business

I hope it helps, feel free to reach out if you have any other questions.

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

Martina Comune di Mandello del Lario 0 Reputation points

2026-10-07T09:44:09.2833333+00:00

Thank you for your response.

Unfortunately, I do not have an account that allows me to open a support ticket with Microsoft 365 for business.

Could you please advise me on how I can contact Microsoft Support or proceed with this request without having such an account?
Stefan Blom 353.9K Reputation points MVP Volunteer Moderator

2026-10-07T09:50:52.3833333+00:00

Unfortunately, I do not have an account that allows me to open a support ticket with Microsoft 365 for business.

Could you please advise me on how I can contact Microsoft Support or proceed with this request without having such an account?

If you are not a local Office admin in your organization, you will have to find a person who is. Only that person can initiate contact with Microsoft business support.
Martina Comune di Mandello del Lario 0 Reputation points

2026-10-07T12:48:45.15+00:00

Thank you for your response.

Unfortunately, I do not have an account that allows me to open a support ticket with Microsoft 365 for business.

Could you please advise me on how I can contact Microsoft Support or proceed with this request without having such an account?
Doris V 1,865 Reputation points Microsoft External Staff Moderator

2026-10-08T06:56:19.2633333+00:00

Thank you for the update.

If you do not have access to a Microsoft 365 Business support account, please contact your Microsoft 365 administrator, as only administrators can create support requests with Microsoft Support.

To find your admin Find the administrator for your work or school account

If you purchased the subscription through a Microsoft partner or reseller, you can also contact that partner directly for assistance and escalation options.