I understand that you would like to know if Intel ® HD 4400 supports MST and HBR2.
Regarding this, To better assist you with your request, I will need to check some information about your computer. Please follow these steps:
1. In the keyboard, press WinLogo key + R.
2. In the Run box please type dxdiag and hit Enter.
3. Click on Save All Information (save it in your desktop).
4. Attach the report to this thread.
Thank you for your response,
After reviewing the information and checking the technical product specifications of the processor you have, the integrated graphics support HBR2 properly.
You can find the different technical product specifications in the link below:
That is just for your information.