Microsoft has made an important change in recent Windows 11 Pro Insider Preview builds by disabling SMB guest authentication fallbacks by default. This has been done to improve the security of the OS.
Microsoft has published a reminder that the upcoming Windows 11 24H2 may break connections to third-party NAS with errors like 0xc000a000, 0x80070035, 0x800704f8, and others. Here is what to do.