Microsoft's federal tax ID is 91-1144442. Should you require a W-9 form from Microsoft, email the Microsoft Ignite registration team at firstname.lastname@example.org with subject line, "ATTN: FINANCE, W-9 Request."
The Microsoft DUNS number is 08-146-6849.
If you are not
attending Microsoft Ignite but are seeking a W-9 for
purchases made at a Microsoft Store, contact email@example.com for assistance.