KMSPico Download for Windows 7/8.1/10/11 & Office 2016/2019/2021 also used as Windows 7/8.1/10/11 Activator & Office 2016/2019/2021 Activator. That is, if you sign into Office on a 6th machine, MS automatically unlicenses one of the other machines. This is only an problem if you need to be logged in to 6+ machines at a time. We used E3 licenses for everyone. Although now that Office 365 is Microsoft 365, I think the E3 license we had might not be the E3 license that's currently available.
To install Office Online Server. Download Office Online Server from the Volume Licensing Service Center (VLSC). Office Online Server is a component of Office, so it is available under each of the product pages including Office Standard 2016, Office Professional Plus 2016, and Office 2015 for Mac Standard. Run Setup.exe.
I reinstalled the fresh windows 10 version:1809 to my pc and again installed the Office 2019 from ISO, during the installation the final window this message appear. The installation path showing as follow path. C:\Program Files\Microsoft Office Web Apps. But no relevant exe file (winword.exe/ outlook.exe) available to run on that location.

The one-time payment licence to Office 2019 is a one PC or Mac licence, it can not be installed on multiple devices at the same time, that licence does however have transfer rights to another PC. It is only the subscription based Office 365 that you can install on all your devices at the same time . . .

If there are many machines can not install Office 2019, can you install Office from Internet (CDN)? If so, you can delete SourcePath="c:\windows\it_files\microsoft office 2019 standard" from configuration file. And run setup.exe /configure command to install Office directly from Internet.
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install office 2019 professional plus