I lost the email containing my Microsoft Office product key

The way to retrieve a lost Microsoft Office product key depends on how Office was originally purchased.

1. If Office was downloaded from an online store (including Microsoft Store):
   • The product key is usually in the email receipt.
   • Check spam, bulk, or junk folders.
   • Search mail for “Microsoft” or the store name.
   • If purchased from Microsoft Store, sign in at the store site with the same account used to buy Office, go to Order History, locate the Office purchase, and select Install Office to view the product key (this does not reinstall Office).
   • If purchased from another online store (for example Digital River), use that store’s Order History or download information page to retrieve the key.
2. If Office came in a box, card, or disc:
   • Look for the 25‑character product key on the card, sticker, or packaging.
   • If the packaging directs to a site such as Office.com/getkey, follow those instructions to obtain the key.
3. If the key was for Office 2007/2010 and is now lost:
   • If there is valid proof of purchase, contact Microsoft support; support may be able to replace the key or provide other options.
4. If the key was for Microsoft 365 (subscription):
   • Typically, Microsoft 365 is activated by signing in with the Microsoft account used to purchase it, not by re‑entering the product key. Sign in at the Microsoft account, Services & subscriptions page with the correct Microsoft account to install and activate.
5. If the key was damaged or otherwise unusable but proof of purchase exists:
   • Contact Microsoft support; support may be able to replace the product key or offer alternatives.

If the original email receipt and any associated online store account access are no longer available and there is no proof of purchase, the product key generally cannot be recovered.

References:

• Find your product key for Office 2010
• Find your product key for Office 2007
• Using product keys with Microsoft 365
• Install or reinstall Office or Microsoft 365 through Microsoft Workplace Discount Program
• Find your product key for Office for Mac 2011