One time purchase 2022 Office Home Edition failed to activate

Good news — this isn't something you did wrong, and it's a known issue.

Microsoft confirmed that starting July 13, 2026, some Mac and iOS users began seeing this exact problem: Office lets you open and print files, but blocks editing and saving, and asks you to "Activate Microsoft 365" — even if you only ever bought the one-time version. Your issue started on July 13, so this matches perfectly.

Here's what to try, in the easiest order first:

 1. Update your Mac and Office

Go to System Settings > General > Software Update on your Mac, and install anything available. Then open Excel, go to Help > Check for Updates, and install any Office updates too. This alone fixes it for most people.

 2. Sign out and back in of Excel

If updating doesn't help:

• Quit Excel completely (Cmd + Q)
• Reopen it
• Click your name/profile picture in the top corner → Sign Out
• Sign back in using the same Microsoft account you used when you originally bought Office

 3. Double-check you're using the right account

Sign into account.microsoft.com in your web browser and look under Services & Subscriptions. Make sure your Office license is listed there, and that it's tied to the same email you use to sign into Excel on your Mac.

 4. Check where your Office came from

If you originally installed Office through the Mac App Store (rather than downloading it from Microsoft's website), that version always expects a paid subscription — even if you have a one-time license. If that's the case, you'd need to remove the App Store version and reinstall using the installer from your Microsoft account page instead.

One thing worth knowing: Office 2021 reaches the end of its official support on October 13, 2026. It will keep working after that, but it won't get security updates anymore — so sometime in the next few months it's worth thinking about whether you want to buy a newer one-time version or move to something else. No rush, though — that's a separate issue from what's happening right now.

If you try all of the above and it still won't let you save, that likely means it's a server-side hiccup on Microsoft's end rather than something on your Mac, and it may just need a few more days to resolve from Microsoft.

My answers are voluntary and without guarantee!

Hope this will help you.

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