may not be. its telling unknown publisher while installing...
How to download and install Microsoft Office 2021 Professional Plus on my PC,
Office 2021 Professional Plus download link
How to download and install Microsoft Office 2021 Professional Plus on my PC, I already bought the License key from someone
Microsoft office 2021 professional plus download
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My father recently gave me a microsoft office 2021 professional plus product key however when going through the setup process at office.com/setup multiple times it says service unavailable, i also tried it in the default microsoft office but it says something about volume version and i can't use the product key on that.
Any other alternative to getting an office 2021?
Hi, Microsoft never sold Office Professional Plus 2021, the last Pro Plus Microsoft sold was Office Professional Plus 2019, most used by HUP companies and their employees. Office Professional Plus 2021 sold on the internet at knockdown prices is illicit. Office Professional 2021, which I have cost over £400 in UK, same number of Apps. Have you ever wondered why you are not provided with the Plus bit of the Office? Anyhow, your Office Pro Plus may work for a long time or a short time, some don't work at all. Still you may get your monies worth at 
40.
PS: the next volume Office Pro Plus was Office LTSC Professional Plus 2021. This also is being sold illicitly on the internet.
There used to be a few ways to get Office Professional Plus 2021 from Microsoft. If I remember correctly, that version (along with many other non-subscription products, including older versions of Office) was included in some MSDN subscription packages (and/or possibly in some Visual Studio subscription packages). Getting Office as part of such a subscription wasn't cheap, though.
I don't remember the details, but I do know that Office MVPs were offered some of those subscriptions quite some time ago.
This is NOT helpful! I have a valid Microsoft product key for Office 2021 but the ONLY link provided takes me to the Office365 website and that is NOT what I purchased. There is no way to actually download Office 2021. Why is this?
Hi, I'm Diane and I'm happy to help you today.
Did they give you instructions on how to download it? If you go to office.com/setup and sign in with my Microsoft account then enter your key, is it accepted? If yes, its a valid retail key and you can download it from your Microsoft account.
Let me know how it goes, I'm here to help you further if needed.
-- Diane