As of update 24H2, Shared PC Guest account no longer works on domain-joined PCs

Hello all,

At our school, a number of domain-joined PCs using the SharedPC function to allow both domain and guest user sign-on will no longer allow the Guest option after updating to 24H2. Upon clicking Sign In, you are met with about half a second of a loading screen, and nothing else happens. Windows 10 PCs and anything running an older version of Windows 11 remains unaffected.

Security logs indicate that each and every time you attempt this sign-in, an event 4724 is logged that an account attempted to change another account's password.

Microsoft says here that a domain user will throw this error when a password does not meet length requirements.

No password policy is enabled in Group Policy, and I have changed several other settings as well in an attempt to correct this including following the steps provided in this post.

This account is supposed to function without a password entirely, and I feel that the recent changes made during this update (related to the other post I linked above) are probably related to my issue somehow.

Thanks for any info.

***Move from Windows / Windows 11 / Windows update***