Hello,
Based on my search, Windows ARM preview currently requires activation with the Pro version may be due to its development stage. The ARM preview is likely targeting professional developers and organizations which typically have access to the Pro version.
Microsoft requires activation for personalization features as a way to encourage and ensure the purchase of legitimate software. The message about connecting to your organization’s network is likely because the Pro version of Windows is geared towards enterprises, which have different activation methods involving a Key Management Service (KMS) within an organization’s private network.
However, this feedback is very valid for home users interested in trying new builds. I recommend sending this feedback directly to Microsoft.
Best Regards,
Hania Lian
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