Installing Microsoft 365 (formerly Office 365) with a product key is a straightforward process that links the license to your personal Microsoft account. Once linked, you don't need to enter the key again to reinstall the software. 1. Redeem Your Product Key
You do not need to enter the product key into the apps themselves. Activation happens via your login. Open any Office app (like Word or Excel).
Choose your preferred version (Default is 64-bit) and click again to download the executable setup file. 3. Run the Installation Microsoft Office 365 Install With Product Key
with your Microsoft account (Outlook, Hotmail, or Live). If you don't have one, create a new account. Enter your 25-character product key without hyphens. Select your Country/Region and Language , then click Next .
In the window, enter the email and password you used in Step 1. Installing Microsoft 365 (formerly Office 365) with a
: If you see this message, the key was likely already redeemed. Check your Services & Subscriptions page to see if the product is already listed.
Before downloading the software, you must associate the 25-character key with your Microsoft account. Go to office.com. Redeem Your Product Key You do not need
: If you have an old version of Office on your computer, uninstall it first to prevent activation conflicts.