how to activate my office 365 ?

Follow these steps to correctly activate Microsoft 365 (Office 365) on Windows and avoid sign-in/activation errors:

1. Confirm the subscription and product type
   • Go to the Microsoft account services page and verify that the subscription is active and that it is a Microsoft 365 plan that includes the Office desktop apps (for home use, this is typically Microsoft 365 Personal or Family, not Microsoft 365 Basic).
   • If the subscription is expired or is a plan that does not include desktop apps, activation will fail and the apps will show as unlicensed.
2. Redeem a new product key (if applicable)
   If there is a new Microsoft 365 product key card or a key from an online purchase that has not yet been redeemed:
   • Go to Office.com/setup or https://microsoft365.com/setup.
   • Sign in with the Microsoft account that will own the subscription.
   • Enter the product key and follow the on-screen prompts.
   • After redemption, install Office from that same account if not already installed.
3. Activate from within an Office app
   • Open Word, Excel, or another Office app.
   • If prompted to sign in, use the same Microsoft account that shows the active Microsoft 365 subscription.
   • If already signed in but activation is failing, go to File → Account and use the option to update or change the license, then sign in again with the correct account.
4. Fix common sign-in/activation issues
   If activation still fails or sign-in issues occur:
   • Sign out and sign back in:
     1. Open a Microsoft 365 app (for example, Word).
     2. Select the name/profile icon at the top.
     3. Select Sign out.
     4. Close the app, reopen it, and select Sign in.
     5. Make sure to use the correct Work or School account for business subscriptions or the correct personal Microsoft account for home subscriptions.
   • Check TLS 1.2 on older Windows versions (Windows 8.1 or earlier):
     1. Open Control Panel → Internet Options → Advanced.
     2. In the security section, ensure TLS 1.2 is checked, then select Apply and OK.
     3. Restart the device and try activation again.
   • Proxy/firewall considerations: if behind a proxy or firewall, ensure Windows HTTP clients and the firewall are configured to allow Microsoft 365 activation endpoints as described in the referenced articles.
5. Use the Microsoft 365 activation troubleshooter (Windows 10 or later)
   • Run the Microsoft 365 activation troubleshooter from the Get Help app using the same Windows device where Microsoft 365 is installed.
   • Follow the guided steps; when finished, apply any suggested fixes and retry activation.

If after these steps the apps still cannot activate, use the guided support for Office activation issues in a browser, which can automatically diagnose and fix many common activation problems.

References:

• Microsoft 365 Apps activation error "AADSTS9002313: Invalid Request"
• Activate Office for Windows
• Sign in issues when activating Microsoft 365 Apps
• "Sorry, we can't connect to your account." error when you activate Office from Microsoft 365