License & Subscription Issues

How to Cancel Office 365 E3 Subscription Without Login Access

Kushani Nimanthika Sep 27, 2026 870 views

Question details

The user needs to stop recurring monthly charges for an Office 365 E3 account (originally a Power BI trial) but no longer has the administrator email, password, or login credentials to access the billing portal.

How to Cancel an Office 365 E3 Subscription Without Login Access

Product: Office 365 E3
Device & OS: not provided
Scenario: Attempting to cancel an active Microsoft business subscription without having access to the administrator account credentials.
Observed behavior: The Office 365 E3 subscription is generating monthly charges on the payment method, but the user cannot log into the Microsoft 365 admin center to process the cancellation.

Before you start

Gather your corporate credit card statements showing the charges, your company details, and check the email inbox of the person who originally signed up for the trial for any Microsoft welcome emails.

Solution 1Recommended

Locate Tenant Credentials and Contact Microsoft Billing Support

Since you cannot access the admin portal to cancel the subscription online, you must retrieve your tenant information from past emails and verify your identity via Microsoft's phone support.

Office 365 E3 is a business subscription. For security reasons, Microsoft community forums cannot access or manage business billing information. The only way to bypass a lost admin login is to contact their billing support directly with proof of ownership.

Search for the Welcome Email

Check the billing contact's email inbox for the original welcome message sent by Microsoft during registration. Look for the tenant information and the administrator ID, which is typically formatted as username@tenant.onmicrosoft.com.

Gather Billing Information

Prepare your company name, exact billing details matching the credit card being charged, the phone number used during registration, and an alternate email address.

Contact Microsoft Support

Call Microsoft Business Billing Support by phone. Provide the representative with your tenant ID and billing information to verify your identity, then request the immediate cancellation of the Office 365 E3 subscription.

Business Subscription Policy: Direct phone support is required because self-service password resets cannot be completed without knowing the exact administrator email address.

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Frequently Asked Questions

What is the format of an Office 365 E3 administrator ID?

The default administrator ID for Microsoft business subscriptions usually follows the format username@tenant.onmicrosoft.com, unless a custom domain was explicitly configured during the initial setup.

Can I cancel my Office 365 E3 subscription through my bank?

While you can ask your bank or credit card issuer to block future charges from Microsoft, it is highly recommended to contact Microsoft support to properly close the account. Blocking charges without canceling the subscription may lead to outstanding balance issues.

Is it possible to reset the admin password if I do not know the email address?

No. If you do not know the admin email address, you cannot use the automated self-service password reset tool. You must contact Microsoft Business Support by phone and verify your identity using corporate billing information to regain access or cancel the service.

Login & Account Issues