Hi Ad de Kroon,
Thank you for connecting with us in Microsoft community.
According to your description in the support category "Microsoft 365 and Office / SharePoint / For business / Windows"
Before moving forward, may I please re-confirm since you have an email account related to Microsoft 365 Business Basic / Standard / Enterprise / Education subscription service, I need to confirm whether you are an Office 365 global admin or an End user person?
Because this is very important information. And I would like to share important information, this scenario is connected to two-step verification method, and different Microsoft subscription services have different configuration and support options.
==================================================================================================
I will provide the following information based on our support limits. Because, since we are from the Microsoft 365 Business/Education support team and provide potential address information for Microsoft 365 Business Basic/Standard/Enterprise/Education subscription services related to this forum support category.
In the order of the given scenario, if you have an email account related to Microsoft 365 Enterprise/Education subscription services provided by the global administrator of the related organisation and if you are an End user, you will need to contact the Office 365 global administrator of the enterprise tenant organisation for an MFA-related situation.
Because they're managing or resetting the MFA (multi-factor authentication) scenario on their end using the Microsoft Entra admin center. They may need to perform Require re-register MFA / Revoke MFA sessions for the user account. They can delete previous registered information from Microsoft Entra admin center.
This is the official document that applies to the Global Administrator reference: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID | Microsoft Learn
Once your organisation's global admin has reset MFA for your account, you'll need to set up two-step verification again.
==================================================================================================
In addition, if necessary, the Office 365 Global Administrator of the related organisation can also contact Microsoft's frontline support team via an open service request from the admin center for further resolution of the situation related to end-user two-step verification.
After diagnosing the scenario, our technical support team can provide possible information and guidance on your part to the administrator.
For this standard process, here's the official Office Global Administration Reference document: Get support - Microsoft 365 admin | Microsoft Learn(online option).
Here are some important notes:
Please note that since forum community moderators do not have any permissions or resources to verify and run any backend processes in this public community for the user account login scenario with MFA or reset the user account password. Because this case is insensitive and related to the security of the email account. This entire case can be verified by a dedicated support team from your backend resources. But at least we can try to provide the necessary direction for your mentioned scenario.
End users should contact the Office 365 global administrator of their respected company, school, or university organisation to perform some standard process and connect with the frontline support team for further resolution.
If an organisation's Office 365 Business/Business/Education subscription is from a syndicated partner or reseller, and if the global admin can't open the service request on your end, you might need to contact the reseller's support provider so that they can help the global admin open the service request on your ultimate heir. after the Office 365 support team participates in the service request created.
Note that the above information applies to Microsoft 365 Business Basic/Standard/Enterprise (E3/E5)/Microsoft 365 Education subscription services.
If I don't understand your initial description, you need to correct me with a brief piece of information, for example, if you are an admin person for this mentioned scenario. Because this information will help us give more instructions for the administrator account scenario. But, you need to share more information about it first.
==============================================================================
I would greatly appreciate your valuable cooperation and valuable time.
Sincerely,
Vaidya Darpan