The managed config shipped in /etc never reached updated devices:
mdatp-firstboot creates /etc/opt/microsoft/mdatp on the device, so ostree's
/etc merge treats that directory as local and doesn't add new image files
under it. VM 123 had the file in /usr/etc but not in /etc, and Defender
kept its defaults.
Ship it in /usr/share/mdatp-managed/ and install it into
/etc/opt/microsoft/mdatp/managed/ from an ExecStartPre in mdatp.service.
This also applies changes from newer images and undoes local edits.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Wesley van TilburgandClaude Opus 5.5
5504f4e7aa