How to enable HD video in Microsoft Lync

ISSUE:  You can change video resolution on lync client by increasing/decreasing the capture window size. The video resolution change can be either of these following type --

      1. QCIF (176×144) 15fps
      2. CIF (352×288) 15fps
      3. VGA (640×480) 15fps
      4. HD (1280×720) 13fps 

The default video resolution set on lync server normally is VGA .

1. How to know about it?

The answer is here.

2. How to change video resolution it?

Open lync server management shell in administrator mode.
Now give following command ---

Set-CsMediaConfiguration –Identity Global -MaxVideoRateAllowed Hd720p15M

The underline attribute can be either Hd720p15M, VGA600K, and CIF250K.

3. How to make sure that configuration is applied?

The answer in here.