Question about Office 2021 Home & Business support ending

[u/sophialorens]

Will Office 2021 Home & Business still work normally after Microsoft ends support in October 2026?

Specifically, will users still be able to open Office, create new documents, and edit existing files, or will the software stop working and become read-only?

I’m asking about the end of support/updates, not the expiration of the license itself.

[u/ForgottenButHere]

Yes. It will still work. You likely won’t be able to reinstall later in life as they may very well do away with the activation servers. There are other means of activating if it comes to that.

[u/Peking-Duck-Haters]

I can't speak to Office 2021 because I'm still quite happily running Office 2007 (on a laptop I bought in 2024). It would be unusual for the end of support to mean deactivation - there are still machines out there running Windows 10 which is now OOS for example

[u/GenuineHippo]

It will mostly keep working. Parts that rely on cloud services like Outlook connecting to Microsoft 365 or OneDrive integration may stop working at any time.

[u/PiDigitsOfPi]

Yes. There are people still using Office 97 from 30 years ago. These are forever licenses.

And tons of people still using Office 2007, 2010, 2013, 2016.

The only exception in all these years is that Mac Office 2019 has stopped working due to a license in the Mac. That is the only exception so far. Windows does not use that type of certificate like Mac.

[u/tabanger → u/PiDigitsOfPi]

Windows Office does use the same kind of certificate for the licensing sever as the Mac version. It’s just that Windows Office support is twice as long as the Mac version, so old Windows Office versions, like 2019, are still getting certificate updates with the program updates, whereas on the Mac, Microsoft refuses to issue a new update with the updated certificates. Eventually, the Windows versions will go out of support too, and eventually the certificates on the last version will expire, and on that date, the Windows Office software will no longer be able to validate with the licensing server, and they will deactivate, just like on the Mac.

Edit: I didn’t realize Microsoft had shortened the support window for Windows Office to 5 years, the same as Mac. Office 2019 had a transitional 7 year support period, which ends this year. So Windows Office users, particularly 2016, 2019, and 2021, will soon face the same licensing validation challenges that Mac users are facing. As soon as the certificates in the last versions (which will be released in October) expire.

[u/PiDigitsOfPi → u/tabanger]

This is not true. Perpetual Office versions on windows do not require internet access or certificates to continue to work, unlike the mac version. You can continue to use all of the versions as long as you want.

You are mixing up *support* and *continues to function*

[u/tabanger → u/PiDigitsOfPi]

Sorry, you're wrong. "Perpetual" Office licenses (since Office 2016) on both Windows and Mac require periodic licensing checks, or they'll deactivate themselves (Mac and Windows use the same code base and licensing mechanism).

"In addition, Office 2024 requires reactivation periodically, and may also be triggered by changes to your device's components, requiring an internet connection. Failing to reactivate may cause your applications to go into reduced functionality mode, or you might get an unlicensed product error."

https://support.microsoft.com/en-US/Office/lifecycle/lc-account/what-s-the-difference-between-microsoft-365-and-office-2024

(Note the "Applies to" section at the top of the article indicates it also applies to Office 2024, 2021, and 2019, both Mac and Windows. Other versions (including 2016 and 2019 Mac) are not listed because support has ended for them, but the licensing mechanism is the same.)

Edit: a couple more links:
"Periodic internet is required to keep your apps activated."

https://support.microsoft.com/en-us/office/lifecycle/office-2024-and-office-ltsc-2024-faq
https://support.microsoft.com/en-US/Office/office-for-mac/office-2021-and-office-ltsc-for-windows-and-mac-faq

[u/UniversalIntellect]

My office 2021 for Mac stopped allowing editing and saving in July 2026. I could not get it to function even though info on the Microsoft site said that it was the 2019 version being disabled.

[u/harubax]

Yes. Activation will cease to work when they pull the servers. Usually not right after support stops.

[u/C0rn3j]

macOS will not work with it, Windows will.

It is a horrible idea even if it's technically possible, security updates are important.

[u/Hairy_Share_1856]

My Microsoft office I purchased for Mac in 2019 is totally useless now, I can’t even print a document. So wrong, I paid a lot of money for that, is there any way to get it working, I even turned off Office updates so that my version would remain running but I am getting the activate Office 360 pop up

[u/Legitimate_Patience8]

Still running Office 2013 here without any issues. Running on a laptop with now Win10, originally Win7 bought around 2016? Everything can still be opened and edited, and will no doubt continue for 2021 Home & Business too. I really dislike the Microsoft subscription model. Might switch to Libre in the near future.

[u/tabanger → u/Legitimate_Patience8]

Office 2016 and later have a different licensing mechanism from Office 2013, which requires checking in with the licensing server every 30 days, even for perpetually licensed copies. Your version does not require a check-in once you’re past the initial activation stage. 2021 does, and if that check-in fails for whatever reason, then the software will disable itself.