That is great information... I was able to connect to a local SNAP account by setting that LAN Manager setting to Send LM & NTLM: Use NTLMv2 if negotiated in my local policy. Still not working with domain logins, but this is a great step forward for business that are stuck with these unsupported SNAP server. Local accounts could potentially be created for each user.

If you want to login to your SNAP Server, try using <SNAP_SERVER_NAME>\<Local Account Name> with the setting above.