Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi @Sofia,
Welcome to Microsoft Q&A forum.
Thank you for reaching out. I understand how concerning it is to start a new Microsoft 365 Business trial and then see a message saying the account doesn’t exist when you try to sign in.
When you registered for your Microsoft 365 business trial, Microsoft sent a confirmation email to the address you used during the sign‑up process. That message contains your administrator account details, which usually follow the format ******@yourcompany.onmicrosoft.com.
It’s important to note that the email you used to sign up or receive notifications is often different from the actual admin account required to sign in to the Microsoft 365 Admin Center.
If you’re unsure which admin account was created, please check your inbox for the original confirmation email. Searching for keywords like “Microsoft” or “onmicrosoft.com” can help you locate it.
If you still can’t locate that email, this situation requires immediate contact with Microsoft’s Data Protection Team. Please note that only the Data Protection Team has the necessary permissions to reset your account from the backend. They are the designated and authorized team for handling account-related issues of this nature.
Option 1: Contact Microsoft Data Protection Support by Phone (Primary Method)
To regain access to your admin account as you can't access the Admin Portal, you can try reaching out to our Global Customer Service phone to raise a request for resetting your authentication method here: Customer service phone numbers - Microsoft Support. During the call, request to speak to an agent, and share with them every detail related to your query and also mention that you are the only admin lost access to your account. This should allow you to contact the appropriate team so you can solve this incident as soon as possible.
Here are some tips and an example of a prompt to help you navigate the IVR more effectively:
In some countries, it is an automated conversation like:
IVR: What kind of problem are you concerned about?
You: Authenticator.
IVR: What kind of product do you use?
You: Office 365 for business.
IVR confirmation: education or company account?
You: For companies
IVR: Are you an administrator?
You: Yes.
IVR: Do you have another administrator in your organization?
You: No.
IVR: Do you need a... Service request?
You: Yes. I need to create a ticket. Please send me direct to the Data Protection Team.
Option 2: Create a Temporary Account (Trial Tenant) to Submit a Support Ticket (Alternative Method)
If you still cannot reach to a live agent, there is still a workaround, you might consider registering for a new tenant by signing up for a trial subscription via this link Microsoft 365 Business Plans and Pricing | Microsoft 365. This would allow you to create a new tenant following the prompts provided. Once set up, you can access the admin console of the new tenant and submit a support ticket requesting to speak with the Data Protection team on behalf of your previous tenant.
Just to clarify, moderators do not have the ability to view or change user account information, so we cannot help with login issues, password resets, or modifying access rights. Even though we cannot access the internal tools required for account‑specific fixes, we are here to support you in every way we can within our scope.
Please remember to cancel the trial subscription after your issue is resolved, as this will help you avoid any accidental billing. You may prefer the following resource for detailed instructions: Cancel your Microsoft business subscription in the Microsoft 365 admin center | Microsoft Learn
I hope this information helps. Please try the steps and let me know whether they resolve the issue. If the problem persists, we can work together to find a solution.
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