My sister works in the NHS. It's all smartcard based. Also kerberos could achieve the same as NTLM for SSO and is more secure, and less complicated in multi-dom

My sister works in the NHS. It's all smartcard based. Also kerberos could achieve the same as NTLM for SSO and is more secure, and less complicated in multi-domain setups, since the client does all the hard work rather than servers having to contact remote DCs themselves.