

I would recommend to use WindISO image to upgrade system. I noticed you want to update multiple computers to Windows 10 1909. I would not recommend to download from third party website even though they have saved KB4517245, but we can't sure if it will bring any security risk or insert any virus software into this package. Microsoft have deleted it from Windows Update Catalog since is was replaced by the latest version Windows 10 2004.
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However the package is not available to download from Windows Catalog Update.

Microsoft says it’s aware of one known issue in this release which affects PCs during the Out of Box Experience (OOBE) where you might not be able to create a local user with IME.If you need Windfeature update, we need to download package KB4517245. The November 2019 Update is currently being shipped as enablement package, which is a “master switch” to activate the version 1909 features on May 2019 Update. As a result, improvements included in monthly updates for Windows 10 version 1909 will also apply to version 1903. In the changelog, Microsoft explains that Windows 10 version 19 share a common set of core components and identical files. Windows 10 version 1909 is a service pack for May 2019 Update PCs, which means both versions will share the same monthly updates but the build revision number will differ. November 2019 Update is getting the same cumulative update Build 18362.476 also includes security improvements and fixes for Microsoft Edge, Internet Explorer Windows Kernel, Windows App Platform and Frameworks, Windows Virtualization, Windows Datacenter Networking, Windows Cryptography, Microsoft JET Database Engine, Microsoft Scripting Engine, and Windows Linux.
