how do i get back to my original use of microsoft products without activating them?

Question

Long long ago I purchased the microsoft office products and they have been installed on my computer and I've been able to use them freely. I am a consultant and one of my clients now uses microsoft products and now, i'm being asked to activate my 360 account for personal files? For example: I haven't used Excel for this client yet, and I just opened a personal Excel file. I am not able to save my updates until I activate an account. It has been so long since I downloaded the microsoft office products, I don't have an account. What do I do to be able to use excel for my personal use like I've been doing. I also want to ensure that I don't use my client's work account for personal files.

Answer 1

Hi seems that you are being prompted to activate a free trial version of Microsoft 365 Personal/Family. See if you can uninstall any Microsoft 365 by going to Control Panel>Small icons>Programs and Features>Find Microsoft 365 Family/Personal and Right click on it and choose uninstall.

PS: are you sure that you still have a perpetual version of Office still installed on your computer. You should see it/them at the control panel.

Answer 2

Excel and the other Office apps now require activation with an account or a valid perpetual license. When activation fails or is missing, Office goes into a reduced‑functionality mode where files can be opened and printed but not saved, which is what is happening.

Key points from the scenario and context:

1. Older perpetual Office vs Microsoft 365 subscription
   • A perpetual license (for example, Office Home & Student 2021, Office 2019, Office 2016) is activated once and then can be used as long as the product is installed and the license remains valid. This is called a “perpetual license.”
   • Microsoft 365 subscriptions (Microsoft 365 Personal/Family/Business) require a current subscription and sign‑in with the account that owns the subscription.
   • If Office is not activated or the license cannot be found, Office shows Unlicensed Product and disables most features, including saving.
   • The Office Activation Wizard and activation messages are designed to prevent unlicensed use and “casual copying.”
2. Why Excel is now asking to activate
   • If Excel is prompting to activate and will not save, it means the installed Office is in an unlicensed or deactivated state.
   • This can happen if:
     • The original product key was redeemed long ago and is now tied to a Microsoft account, and the app is not signed in with that account.
     • The installed product is actually a Microsoft 365 trial or subscription install (for example, pre‑installed on the device) that has expired, not the original perpetual Office.
     • The product was deactivated or signed out, or the wrong account is signed in.
3. How to get back to using Excel for personal use (without using the client’s account) Follow these steps, keeping work and personal completely separate:
   1. Check what license actually exists for the personal Office
   • Go to the Microsoft account services page: Subscriptions.
   • Sign in with any personal email addresses that might have been used when Office was originally purchased or redeemed.
   • If a perpetual Office product (for example, Office Home & Student 2021, Office 2019, Office 2016) or a Microsoft 365 Personal/Family subscription appears there, that is the account that should be used to activate Office.
   • If nothing appears, then there may be no current license associated with that email, and the installed Office may be a trial or expired subscription.
   2. Make sure the correct account is used in Office, not the client’s
   • In Excel (and other Office apps), go to File → Account.
   • Under User Information, sign out of any work or school account (the client’s Microsoft 365 account).
   • Sign in with the personal Microsoft account that shows the Office product or subscription under Subscriptions.
   • Office should then activate and allow saving again.
   3. If Office still shows as unlicensed
   • If the correct personal account is signed in and activation still fails, follow the activation troubleshooting steps for unlicensed product:
     • Confirm again that the subscription or license is active and visible under Subscriptions.
     • Ensure there is not more than one conflicting Office installation on the Mac (for example, an old perpetual version plus a newer Microsoft 365 trial). Multiple copies can cause activation conflicts.
     • If the installed product is a Microsoft 365 subscription but the account only has Microsoft 365 Basic, note that Microsoft 365 Basic does not include desktop apps; it only includes OneDrive storage and Office on the web. In that case, the desktop apps will not activate and cannot be used fully.
   4. If there is no recoverable license
   • If no personal Microsoft account shows any Office license or subscription, and the installed Office is now in unlicensed mode, there is no supported way to continue using the desktop apps fully without a valid license.
   • Options then are:
     • Purchase a new perpetual Office license (for example, Office Home & Student) under a personal Microsoft account and install/activate it with that personal account.
     • Or subscribe to Microsoft 365 Personal/Family under a personal account and install from that account.
     • For free use, use Office on the web in a browser via Free Office on the web for personal files, which keeps work and personal separate and does not require using the client’s account.
4. Keeping work and personal completely separate
   • Do not sign into the desktop Office apps with the client’s work account for personal files.
   • Use a personal Microsoft account for any personal Office license or subscription.
   • For client work, sign into Office with the client’s work account only in a separate profile or device if possible, and keep personal files in a different profile or storage location.

In summary, to get back to using Excel for personal use without relying on the client’s account, a valid personal Office license or subscription must be associated with a personal Microsoft account and that account must be used to sign in and activate Office. If no such license exists anymore, the only supported options are to purchase a new license/subscription or use the free Office on the web for personal documents.

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References:

• Unlicensed Product and activation errors in Office
• "This product key has already been used" error in Office
• Why do I need an account to sign in to Microsoft 365 or Office?
• I forgot the account I use with Microsoft 365
• Description of Microsoft Product Activation for legacy products
• Description of the Office Activation Wizard
• A subscription notice appears when I open a Microsoft 365 application
• Excel is no longer registered and can't access some server so it won't let me save anything - Microsoft Q&A
• No license associated with my email account - Microsoft Q&A
• "Activation Status: We're still trying to activate office" - Microsoft Q&A
• When opening Word or Excel, getting a 'subscription canceled' message but I have renewed my Office subscription - Microsoft Q&A