That said, Microsoft is urging users not to go back to allowing guest access as a default. If a remote device is configured to use guest credentials, the process should be for an administrator to disable guest access to the device and configure the correct authentication and authorization.
If a remote storage device needs guest access to a system like a small business NAS, the user will see one of a number of error messages when connecting from Windows 11 Insider Pro over SMB, including: You can't access this shared folder because your organization's security policies block unauthenticated guest access. These policies help protect your PC from unsafe or malicious devices on the network.Anyone seeing these error messages will need to configure the remote device to require a username and password for SMB connections so it no longer needs guest authentication.