tl:dr - Microsoft says my copy of pre-installed Office apps is not activated after I reset my laptop due to issues. My laptop (Lenovo Ideapad L340 Gaming) came pre-installed with Microsoft Office Professional Plus 2019. Due to performance issues I had reset my laptop more thrice, and this never affected Microsoft Office in any way. "Your copy of MS Pro Plus 2019 cannot be activated because the specified Product Key has already been activated the maximum no. of times. for your software license as specified in the MS License Terms .." As such, I went to MS Store to purchase the a new copy of the Ms Office Pro Plus 2019 @ S$229 again and downloaded the installation file.

There's no option for Office 2019. Is that bad news? Hi, yes. It sounds like you have purchased an Office from a vender selling them in contravention of the Microsoft licence at a knock down price. Are you sure that you do not have Office 2019 Pro Plus? PS: the vendor may be able to assist you.

I also have two office 2019 product keys, one for Professional Plus and the other for Home and Business. I have installed Professional plus and activated it on one of laptops without any issue. When it comes to Home and Business 2019 on my other laptop, I have registered the product key against my microsoft account and installed it on my other

I am updating my desktop computer running Windows 10 from Office Pro Plus 2013 to Office Home and Business 2019. Prior to installing Office 2019, I first uninstalled the corresponding 2013 apps; Word, Excel, PowerPoint, Outlook, and OneNote. I went to the download link, entered my 2019 keycode, and it provided the expected installer files.

Generally, this issue may be caused by an activation key for Office Professional Plus 2019 existed on your computer. I suggest you try following steps to check Office activation information. Search CMD, right-click the Command Prompt and run as administrator. Then copy and paste the command below in it, click Enter at last:
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microsoft office professional plus 2019 not activated