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If you have an active or canceled Azure subscription associated with your Microsoft Entra tenant, you can't delete the tenant. After you cancel, billing is stopped immediately. After you cancel a subscription, your billing stops immediately. You can delete your subscription directly using the Azure portal seven days after you cancel it, when the Delete subscription option becomes available. Once your subscription is deleted. Microsoft waits 30 to 90 days before permanently deleting your data in case you need to access it or reactivate your subscription. We don't charge you for retaining this data. To learn more, see Microsoft Trust Center - How we manage your data.
If you have a free trial or pay-as-you-go subscription. You can delete your subscription three days after you cancel it, when the Delete subscription option becomes available. For details, read through Delete free trial or pay-as-you-go subscriptions.
All other subscription types are deleted only through the subscription cancellation process. In other words, you can't delete a subscription directly unless it's a free trial or pay-as-you-go subscription.
The other side about remove your account, when you are trying to delete the tenant one of the prerequisites is no users are in the Microsoft Entra tenant, except one Global Administrator who will delete the organization. You must delete any other users before you can delete the organization.
If users are synchronized from on-premises, turn off the sync first. You must delete the users in the cloud organization by using the Microsoft Entra admin center or Azure PowerShell cmdlets.
For more information, please refer to Delete a tenant in Microsoft Entra ID
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Akhilesh.
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