When you use a Product Key and a Microsoft Account to install/setup Office 2019 Microsoft creates an Office Account from where you can reinstall Office at any time in the future. I have not seen a legitimately for sale Office Professional 2019 anywhere else! Buy Office Professional 2019 - Microsoft Store However, you really need to use a Microsoft Account to set Office up. Hi Jose, you can purchase Office Professional 2019 directly from the Microsoft Store.
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So, please advise how I can buy a legal original unused Microsoft Office 2019 Professional Product Key from a supplier that is recognized by Microsoft, preferably from a supplier located here in Israel, in order to use the key to activate the preinstalled Office 2019 Professional (64-bit) on my HP Z8 G4 workstation. However, this is precisely what I am trying in vain: The 'product keys' offered for sale on the Internet from sources that I don't recognize, might be already used keys or hacked/stolen keys, and thus might not be able to activate legally my Office 2019 Professional software.
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I want to have a permanent right to use this software on this new HP workstation without involving my personal Microsoft account and without monthly or annual payments for resuming a subscription of '365' versions. OK, I am ready and willing to buy a legal product key for Office 2019 Professional, as a one-time purchase! When I decline this offer, and I press: 'I don't want to sign in or create an account', a new window opens and asks me to enter a 25-character product key that will activate Office 2019 Professional.
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When I start Word it offers me to sign-in to set up Office with my Microsoft Account and thus to form an association between my Microsoft email account and this installation of Office 2019 Professional. I have purchased a brand new HP Z8 G4 workstation preinstalled with Office 2019 Professional Click-to-run, useable for a limited period of a few weeks.