You’ve redeemed your product key and installed Microsoft Office 365, but you might still run into activation issues. Don’t worry—Wish Geeks is here to help you troubleshoot some of the most common problems users face when activating Office 365.1. Invalid Product Key ErrorThe invalid product key error is one of the most frequent issues. It usually happens if the key was entered incorrectly or has already been used.Solution:Double-check the key to ensure it was entered correctly.Confirm the key is for Office 365, not another version like Office 2019.If you continue to experience issues, contact Microsoft Support for further assistance.2. Subscription ExpiredSometimes, users may see a "Subscription Expired" message, especially if they’re using an outdated subscription.Solution:Sign in to your Microsoft account and renew your Office 365 subscription through the subscription management page.3. Office 365 is in Unlicensed ModeIf Office 365 is running in "Unlicensed" mode, most features are disabled until it’s fully activated.Solution:Ensure that you’ve signed in with the correct Microsoft account.Run the Office Activation Troubleshooter, which you can find on the Microsoft website, to fix any lingering issues.ConclusionActivation issues can be frustrating, but with these troubleshooting steps from Wish Geeks, you can resolve most problems quickly. By keeping your product key handy, managing your subscription effectively, and using the right tools, you’ll ensure Microsoft Office 365  runs smoothly.