Microsoft Dark Ban Clone Windows Repeat Original SID 🚨
Microsoft has become increasingly strict with Windows internal systems, especially the SID or Security Identifier, which is like the ID card of each machine in a Windows system. It is used to confirm the identity of the time to share files, servers or Remote Desktop.
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For the average user who installs Windows one by one, the system automatically creates a new SID so it can hardly feel any change, but for large organizations with hundreds or thousands of computers, this is a direct impact.
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In most organizations, IT teams usually do not install one Windows at a time, but instead set up one prototype machine, install a program and set everything ready, and then clone or create images on other machines to save time and reduce workload.
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This method is common in IT, but cloned machines have all the same SIDs, which historically may not have made them unusable, but since Windows 11 versions 24H2, 25H2, and Windows Server 2025 onwards, Microsoft will no longer allow duplicate SIDs to authenticate via NTLM or Kerberos.
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As a result, a machine that is cloned without resetting the SID will not share files. Remote Desktop cannot be used. It cannot be logged in, even if the code is correct or uploaded. Error that access denied because the system does not see the identity clearly. The main reason is that Microsoft wants to upgrade security, close a vulnerability that may allow cloned machines to impersonate real machines in the network.
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All IT teams need to do is use the Sysprep tool before Clone every time to reset their old data and create a new SID without duplicating it. This is actually something that IT teams should do in the first place, even if Microsoft doesn't force it. If the SID is duplicated, the Audit System or Audit will definitely not pass. It is called using Sysprep before Clone is the basis that all IT teams should habitually do.
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Source: neowin








































































































