A Microsoft file hosting and synchronization service.
Dear @Anthony Evans,
Thank you for posting your question in the Microsoft Q&A forum.
Based on your description, you wonder how to cancel a Microsoft 365 subscription when the account it’s linked to was created by a former employee and you no longer know how to sign in.
In this situation, if you were the one who purchased Microsoft 365 subscription directly from Microsoft. I recommend you contact to Microsoft Support team, and provide some information to prove ownership such as:
Invoice number (if available)
Last 4 digits of the credit card being charged
Company name and billing address
Domain associated with the subscription (for example: company.com)
The agent will collect your information and redirect you to appropriate team as Billing team who will help you regain your access to account.
To contact Microsoft Support team, you can use this link to find the appropriate contact number: Global Customer Service phone numbers - Microsoft Support
In case you cannot submit ticket during the call, I recommend you create a temporary tenant to submit a support ticket.
Visit Office 365 E3 - Enterprise Collabora
Select any plan and click Try for free.
Complete the setup to create a new tenant.
Ticket support: In the Microsoft 365 admin center>support>help & support. You can create a support ticket: https://admin.microsoft.com/#/support/requests
Important: Please remember to cancel the trial subscription once your issue is resolved to avoid any charges.
I hope information above meet your expectations, let me know if you have any other questions.
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