SDR NTLM Authentication Version?

I found this article showing that at least older versions of Backup Exec system recovery disk uses NTLM v2 but in my expereince testing SDR in Backup Exec 2012 I could only get the SDR session to log in if I reset my domain controller to use NTLM v1 authentication. Is there something that I haven't configured correctly or is this just the way it is? The security requirements of my system require me to use NTLM v2 only.