Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi Daveskth,
Thanks for choosing Microsoft Community.
Based on your description, I know your requirement. In fact, if someone in your organization signed up for a free Microsoft service (such as Power BI or other free services) subscription that automatically associate your domain with an Microsoft 365 tenant, it will not allow to create different one. So please be kindly to check if anyone registered or not. If yes, you can take over such tenant created by that user.
In such case, you can take over such tenant created by users. You can do this with an internal admin takeover. To do that, please visit the article below and follow the steps provided.Here is the document: Perform an internal admin takeover.
If you have any other consult in the future, welcome to Microsoft Community.
Thanks for your precious time. Have a nice day.
Best Regards,
Katherine