SMB Access - Guest access is disabled with SMB2

Default registry value:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters] "AllowInsecureGuestAuth"=dword:0

Configured registry value:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters] "AllowInsecureGuestAuth"=dword:1

Resolution

If you want to enable insecure guest access, you can configure the following Group Policy settings:

1. Open the Local Group Policy Editor (gpedit.msc).
2. In the console tree, select Computer Configuration > Administrative Templates > Network > Lanman Workstation.
3. For the setting, right-click Enable insecure guest logons and select Edit.
4. Select Enabled and select OK.