How to Recover Microsoft 365 Admin Access to Cancel a Business Trial

Find the official Microsoft Support customer service phone number for your specific region via the Microsoft website.

Call the support line and explicitly state that you are the sole Global Administrator locked out of your tenant and need an authentication-method reset from the Data Protection team.

Provide your tenant domain (e.g., yourcompany.onmicrosoft.com) and undergo the required identity verification process, which may take several business days to complete.

Once the Data Protection team resets your MFA, log in to the Microsoft 365 Admin Center using your existing password and set up a new authentication method.

On the Microsoft 365 sign-in screen, click on 'Other ways to sign in' or 'Other verification options' if available.

Select an alternative registered method, such as receiving an SMS text message, a phone call, or using a FIDO2 security key.

If fallback methods fail and you have another Global Administrator on your tenant, ask them to log into the Microsoft 365 Admin Center.

Have the other administrator navigate to Users > Active users, select your account, and click 'Manage multifactor authentication' to clear your old MFA sessions and require re-registration.

Navigate to admin.microsoft.com and log in using your recovered administrator account.

In the left-hand navigation menu, click on 'Billing' and then select 'Your products'.

Locate your Microsoft 365 Business Basic trial subscription in the list of products and click on it to open the details page.

Select 'Cancel subscription' under the Settings and Actions section, choose a reason for your cancellation, and confirm.