How to activate M365 business standard so I can use Word desktop

Dear @John Bettinger,

Good day, and I appreciate the detailed description of your issue. From my research, Microsoft 365 Business Standard subscriptions (including those obtained via a Friends and Family discount from the Microsoft Store) are typically activated through your Microsoft account rather than by directly entering a product key in the desktop apps. The key you received is usually for redeeming the subscription first.

Below are the steps to help you redeem your key and set up a business (admin) account: 

Step 1: Go to https://microsoft365.com/setupbusiness

Step 2: Enter your product key and click Next 

Step 3: Provide your details:  

• Name 
• Work email 
• Business phone number 
• Company name 
• Region 

Step 4: Verify your identity via text or phone call 

Step 5: Choose your domain option:  

• Get a new domain 
• Use an existing domain 
• Add a domain later 

Step 6: Complete the setup by following the on-screen instructions 

Step 7: Once setup is complete, go to the Microsoft Admin Center to manage your subscription 

After the subscription has been redeemed:

1. Go to office.com
2. Sign in using the same Microsoft account
3. Go to Apps > Install apps > Microsoft 365 apps and choose the version for Windows or macOS.
4. Run the installer and let it complete.
5. Open Word (or another app such as Excel).
6. When prompted, sign in with the same Microsoft account.

The apps should activate automatically. There is no need to enter the product key again, as Microsoft 365 Business Standard licenses activate through account sign‑in and cloud validation.

For references:

Sign up for Microsoft 365 Business Standard - Microsoft 365 admin | Microsoft Learn 

Enter your product key for a Microsoft business product or service | Microsoft Learn 

Activating Microsoft 365 Apps for Business with a product key - Microsoft 365 Apps | Microsoft Learn 

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this. Thank you for your patience and understanding. If you have any questions or need further assistance, please feel free to share them in the comments so I can continue to support you. I'm looking forward to your reply.

If the answer is helpful, please click "Accept Answer" and kindly upvote it.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. 

To use Word desktop with Microsoft 365 Business Standard, the product key must first be redeemed to create/associate the subscription, and then activation is done by signing in, not by entering the key in Word.

Follow these steps for Microsoft 365 Business Standard:

1. Redeem the Business Standard product key
   1. Go to https://signup.microsoft.com/get-started/setupkey.
   2. Enter the Office product key without hyphens, then select Next.
   3. Follow the prompts to complete redemption and tenant setup for Microsoft 365 Business Standard.
   This step converts the key into an active subscription and associates it with a Microsoft 365 organization account.
2. Assign the license to the user account After redemption, ensure the Business Standard license is assigned to the user account that will run Word desktop (this is done in the Microsoft 365 admin center; the context provided only covers the redemption step, not the assignment details).
3. Install and activate Word/Office desktop
   1. Sign in to the Office portal using the account that has the Business Standard license.
   2. Download and install Microsoft 365 Apps.
   3. Open Word (or any Office app). When prompted to activate, choose Sign in and use the same licensed account.

Important points from the context:

• For Microsoft 365 subscriptions (including Business Standard), activation is done by signing in with the licensed account, not by entering the product key directly in the app.
• The Business Standard key is redeemed at the Business Standard setup URL; after that, the key itself is not used again for activation.

If Word is still prompting for a product key after these steps, sign out of all Office apps, close them, reopen Word, and sign in only with the account that has the Business Standard license.

References:

• Where to enter your Office product key
• Using product keys with Microsoft 365
• Activating Microsoft 365 Apps for Business with a product key