[German]To test Windows Insider Preview build for Windows 10, Microsoft requires that users are joining the Windows Insider program. But there is a way to do that with a local account.
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A German blog reader Al CiD has send me an e-mail mentions, that it's possible to test Windows 10 Insider Preview builds with a local user account. A developer has posted on GitHub the article OfflineInsiderEnroll – A script to enable access to the Windows Insider Program on machines not signed in with Microsoft Account.
OfflineInsiderEnroll is a simple Windows Command Prompt script to enable access to the Windows Insider Program on machines not signed in with Microsoft Account. The script is compatible with Windows 10 RS5 and later and requires administrative priviliges to run.
According to the developer, the script takes advantage of undocumented TestFlags registry value. If this value is set to 0x20, all access to online Windows Insider services gets disabled. Because of this, it's possible to set a own Windows Insider Preview configuration without being overriden by the contact to the service.
Since Windows Update does not check if machine is actually enrolled to the program, users applying this script will get offered Insider Preview builds by just setting correct values in the registry. Bleeping Computer has published this article with a few more details how to use the script.
