By default, Windows Media MMR adapts to network conditions on single-user desktops that run on Windows and published desktops.

If the network latency between Horizon Client and the remote desktop is 29 milliseconds or lower, the video is redirected with Windows Media MMR. If the network latency is 30 milliseconds or higher, the video is not redirected. Instead, it is rendered on the ESXi host and sent to the client over PCoIP.

You can override this feature, forcing Windows Media MMR to perform multimedia redirection regardless of the network latency, by configuring the RedirectionPolicy registry setting on the desktop.


  1. Start the Windows Registry Editor on the remote desktop.
  2. Navigate to the Windows registry key that controls the redirection policy.
    The registry key that you configure for a remote desktop depends on the bit version of the Windows Media Player.
    Option Description
    64-bit Windows Media Player
    • For a 64-bit desktop, use the registry key: HKEY_LOCAL_MACHINE\Software\VMware,Inc.\VMware tsmmr
    32-bit Windows Media Player
    • For a 32-bit desktop, use the registry key: HKEY_LOCAL_MACHINE\Software\VMware,Inc.\VMware tsmmr
    • For a 64-bit desktop, use the registry key: HKEY_LOCAL_MACHINE\Software\Wow6432Node\VMware,Inc.\VMware tsmmr
  3. Set the RedirectionPolicy value to always.
    Value name = RedirectionPolicy
    Value Type = REG_SZ
    Value data = always
  4. Restart Windows Media Player on the desktop to allow the updated value to take effect.