work\ school account

Sign in with the personal Microsoft account that actually shows the active Microsoft 365 Personal subscription, then remove any old work/school activation identity still retained by Office.

Personal Microsoft accounts and work/school accounts are separate identities and cannot be synchronized or merged. A personal account therefore will not be accepted by a dialog belonging specifically to an organizational service.^1^

1. Verify which account owns the subscription

1. Open the Microsoft Services & subscriptions page in a private/incognito browser window.
2. Sign in with the private email address used to purchase Microsoft 365 Personal.
3. Confirm that Microsoft 365 Personal appears and is active.

If it is not listed, that address is not associated with the Office license. Try any other personal addresses that may have been used for the purchase.^2^

If the same email address exists as both a personal and organizational account, select Personal account when asked “Which account do you want to use?” These remain two separate accounts even though their displayed email addresses match.^3^

2. Activate Office with that personal account

Open Word or Excel and select:

File → Account → Sign out

Sign out of any existing work/school identity, close every Office application, reopen Word, and then select:

File → Account → Sign In

Enter the personal account verified above. Under Product Information, confirm that the displayed product is Microsoft 365 Personal.[^4^](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID] "Sign in to Microsoft 365")

If this is Windows and Office keeps selecting the work account

1. Open Settings → Accounts → Access work or school.
2. Select an obsolete work/school account and choose Disconnect. Do not disconnect an account that is still required to manage the computer.
3. Restart Windows, reopen Word, and sign in with the subscription-owning personal account.

If activation still fails:

1. Open Control Panel → Programs → Programs and Features.
2. Search for Office.
3. If multiple Office versions are installed, uninstall the version no longer used.
4. Restart the computer and reactivate Office.
5. If only one installation exists, run the Microsoft 365 activation troubleshooter through the Windows Get Help application. It must run on the affected Windows 10 or later PC.^2^

If this is a Mac

A previously stored work license can continue controlling the sign-in prompt. Remove the existing Office license files:

1. Quit all Office applications.
2. Download and run Microsoft’s Office License Removal Tool.
3. Open its .pkg file and complete the wizard. A local administrator password may be required.
4. Open Word and sign in with the personal account associated with Microsoft 365 Personal.
5. Restart the Mac after activation.

The tool removes all Office licenses from the Mac, so have the personal account credentials available before running it.^5^

Outlook-specific exception

If the exact message is “You can’t sign in here with a personal account. Use your work or school account instead” in classic Outlook, Microsoft fixed that issue in Version 2303 Build 16227.20202 and later. Check File → Office Account → About Outlook and update Office if the installed build is older.^6^

References

1. What's the difference between a Microsoft account and a work or school account? | Microsoft Support
2. Unlicensed Product and activation errors in Office | Microsoft Support
3. Which account do you want to use? | Microsoft Support
4. [Android](https://support.microsoft.com/accounts-billing/subscriptions/[Subscription ID])
5. How to remove Office license files on a Mac | Microsoft Support
6. Can't sign in to Outlook with Outlook.com account | Microsoft Support