Hi,
Thanks for posting in Microsoft Q&A forum.
1,GPOs are assigned to SIDs (both machine and user). Sysprep changes the SIDs by design. There is no way to keep Sysprep from changing SIDs. The GPOs still exist but they now are referencing SIDs that no longer exist.
2,We could try to use the command-line utility LGPO.exe to configure policies directly in the reference Windows image in MDT. For more information, please refer to:
Deploy LGPO with MDT 2013
LGPO.exe - Local Group Policy Object Utility, v1.0
Microsoft Security Compliance Toolkit 1.0
Note: The non-Microsoft link is just for your reference.
Best regards,
Simon
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