Hi @Stephen Simpson,
Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.
No worries, you can cancel your Azure subscription if your office isn't using it.
If you're using Microsoft Entra (formerly Azure Active Directory) that comes as part of your Microsoft 365 subscription, you do need this for managing user identities. However, this does not mean you need a separate Azure subscription for Azure services.
To cancel the Azure subscription associated with your account, just sign in to the Azure portal, navigate to the Subscriptions page, select the specific subscription, and click on "Cancel subscription.
Note: One more option if you do not want to deactivate the subscription just disable the user that also will do your job
Refer: -
https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/cancel-azure-subscription
https://learn.microsoft.com/en-us/microsoft-365/enterprise/azure-integration?view=o365-worldwide
Feel free to reach out if you have any further questions or need additional information—I’m happy to assist!
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