Investigate a billing charge

Dear @Roeland Van Dender,

Based on your description, a charge displayed as Microsoft-G... is often associated with a Microsoft commercial (business) subscription. In many cases, invoice numbers beginning with "G" are linked to services purchased under a Microsoft business tenant, which typically uses an <tenantname>.onmicrosoft.com domain.

However, from the credit card charge alone, I cannot determine the exact subscription, tenant, or account responsible for the billing.

To investigate the charge, I recommend you should contact the Microsoft Billing Support team, which can review the invoice and identify the associated billing account.

You can contact them via phone service number: Customer service phone numbers - Microsoft Support

For more information, please refer to this article How to investigate a billing charge from Microsoft

I hope your issue would be resolve as soon as possible, feel free to reach out if you have any other questions.

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