Microsoftin sanaluettelo-ohjelmistoperhe verkko-, sähköposti- ja tulostusasiakirjojen luomiseen.
Hi HippuK,
Thank you for reaching out. My name is Leo, a user just like you. I'd be happy to help you with your concern.
May I know if still have your Office application on your device? May I also know if the account you are trying to sign in to activate Office again is a Microsoft account with a domain of "@outlook.com"? If not, the server may not recognize or retrieve the activation and some accounts need an alias ending with "@outlook.com" to retrieve the Office personal license. If it doesn't have that domain, you can create an alias by accessing this link https://go.microsoft.com/fwlink/?LinkId=529489 after you have created, go to the login page again and use the alias to login. Check if it is successful. In case if it is still not recognizing, please let us know for us to assist you further.
Your understanding and patience will be highly appreciated. I hope I provided a helpful information regarding your concern! Let me know if you have any further questions. Be safe always!
Best Regards,
Leo