Federal Tax ID or W-9

Microsoft's federal tax ID is 91-1144442. The DUNS number for Microsoft is 08-146-6849

Should you require a W-9 form from Microsoft, email the Microsoft Inspire registration team at microsoftinspire@microsoft.crgevents.com, with subject: ATTN: FINANCE, W-9 Request.

Keyword(s): W-9, Federal Tax ID, Finance, Payment, D&B, Dun & Bradstreet

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