RouterOS and NTLM

Hi, we’re using v3rc9 (2.9x doesn’t support the SATA interface on the box we’re using) and have a customer that’s reported an issue today logging into a site. The site they are trying to log in to uses NTLM authentication and I’m aware of the issues regarding proxy servers and NTLM - we’ve had issues with other sites that use Fedora Core boxes running Squid. The MT box is setup to work as a hotspot and the the firewall, NAT rules are the default i.e. how the hotspot wizard sets them up. The proxy settings haven’t been touched.

Has anyone got a box working with NTLM in similar situation?