If you sign in with the wrong email address, you may see a message “We couldn’t find any Office products”. If Microsoft Office asks you to sign in to activate the products, you need to enter the account that you used to buy Office. Make Sure You Sign in with the Correct Account 10 Tips to Fix Microsoft Office Activation Errors Tip 1. You can check the possible solutions below to fix Microsoft Office activation errors. You need to fix the Office activation errors to successfully activate Office so that you can enjoy all the Office features again. If your Microsoft Office product activation failed or you meet some activation errors in Office, most Office features may be disabled. Professional Free File Backup Software for PC.10 Tips to Fix Microsoft Office Activation Errors.To recover deleted or lost Office files, you can try the top free data recovery program – MiniTool Power Data Recovery. This post provides some possible solutions to help you fix various Microsoft Office activation errors like product activation failed error in Word/Excel, Microsoft Office activation error code 0x4004f00c/0xc004c060, cannot connect to your account error, etc.