using Ember --proxy behind corporate firewall

I am developing an Emberjs Application behind corporate firewall (NTML Proxy). I have configured proxy settings (using Cntlm) to by pass all devtools.

Things working behind firewall through Cntlm (http://127.0.0.1:3128)

• Git
• Npm
• Bower

But, when ever i proxy request to my cloud api (deployed on Azure) using
ember server --proxy http://ift.tt/2968Vxn --ssl

I am unable to do api request from the served website. If i connect the system to my phone (Wifi), remove proxy config. Every thing runs fine.

how can i forward all request from my website to my api throught my proxy (http://127.0.0.1)