Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
I understand why you do not want to risk cancelling a Realm that is still active and used regularly.
A Realm subscription must be managed through the account and platform where it was originally purchased. If it does not appear under Microsoft Services & subscriptions, check Payment & billing > Order history on any Microsoft accounts that may have been used. If it was purchased through a console or mobile device, check that platform’s subscription settings instead.
If you still cannot locate it, contact Microsoft Support and provide the charge reference, transaction date, and amount privately so they can help identify the account associated with the recurring payment. Avoid cancelling the Realm until the active subscription has been located and its management options confirmed.
Please note that this is a user-to-user support forum. Moderators and contributors cannot access accounts or Microsoft’s back-end systems. We can only provide technical guidance on reported incidents, requests and ideas
Thank you for your understanding and have a good day!