#1 - N/A
Status: N/A
Symptoms: Domain-joined devices might lose their secure trust relationship with the domain.
Workaround: N/A
Affected: Credential Guard protected machine accounts

[Security] After installing the September 8, 2026, Windows security update KB5124012, or later updates, some Credential Guard protected machine accounts might lose their secure channel with an on-premises Active Directory (AD) domain. Users might then be unable to sign in interactively with valid domain credentials and might receive a message stating that the trust relationship between the device and the domain failed.