Hotfix package name: HDXRealTimeMediaEngine_Win_1.4.200.zip

This zip file contains Citrix HDX RealTime Media Engine for Windows and HDX RealTime Connector installation packages for Microsoft Lync 2010.

Citrix HDX RealTime Media Engine is for computers running Windows 8 (32/64-bit), Windows 7 (32/64-bit), and one of the following installed:

• Citrix Receiver 4.1
• Citrix Receiver 4.0
• Citrix Receiver 3.4

HDX RealTime Connector is for computers running Windows Server 2008 R2 (64-bit), Windows 8 (32/64-bit), Windows 7 (32/64-bit), and one of the following installed:

• XenApp 6.5
• XenApp 6.5 Feature Pack 1
• XenDesktop 5.6 (Virtual Desktop Agent)
• XenDesktop 5.6 Feature Pack 1 (Virtual Desktop Agent)
• XenDesktop 7.0 (Virtual Desktop Agent)
• XenDesktop 7.1 (Virtual Delivery Agent)

Readme Revision History

Important Disclaimer - Limited Release Hotfix

If the Download link is not available on this page and you wish to obtain this limited distribution release, visit our support site at http://www.citrix.com/support and open a support case using your Citrix account credentials, or contact your reseller at http://www.citrix.com/partners/locator.

Testing of this release was targeted only at the affected functionality, and regression and stress testing were minimal. Introduce this release to a test environment for evaluation before deploying it to a production environment.

TO THE EXTENT PERMITTED BY APPLICABLE LAW, CITRIX AND ITS SUPPLIERS MAKE AND YOU RECEIVE NO WARRANTIES OR CONDITIONS, EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, AND CITRIX AND ITS SUPPLIERS SPECIFICALLY DISCLAIM WITH RESPECT TO THE HOTFIX ANY CONDITIONS OF QUALITY, AVAILABILITY, RELIABILITY, SECURITY, LACK OF VIRUSES, BUGS OR ERRORS, OR SUPPORT AND ANY IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF TITLE, QUIET ENJOYMENT, QUIET POSSESSION, MERCHANTABILITY, NONINFRINGEMENT, OR FITNESS FOR A PARTICULAR PURPOSE. TO THE EXTENT PERMITTED BY APPLICABLE LAW, NEITHER CITRIX, NOR ITS SUPPLIERS SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL, MULTIPLE, PUNITIVE OR OTHER DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF DATA, LOSS OF INCOME, LOSS OF OPPORTUNITY, LOST PROFITS, COSTS OF RECOVERY OR ANY OTHER DAMAGES), HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, AND WHETHER OR NOT FOR BREACH OF CONTRACT, NEGLIGENCE OR OTHERWISE, AND WHETHER OR NOT CITRIX, ITS SUPPLIERS, OR LICENSORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Important Notes about This Release

• Install Citrix HDX RealTime Media Engine on client devices where Citrix Receiver is installed.
• Install Citrix HDX RealTime Connector on XenApp Server or on XenDesktop VDAs (Server or Workstation OS).
• Both packages must be installed and at the same version in order for the HDX RealTime Optimization Pack to function.

Where to Find Documentation

This document describes the issue(s) resolved by this release and includes installation instructions. For additional product information, see Citrix eDocs the Citrix Product Documentation Library.

New Fixes in This Release

1. In deployments that utilize the Lync Optimization Pack, messages that follow in short order in Lync 2010 can cause Lync 2010 (communicator.exe) to exit unexpectedly.

   To prevent this issue, install this fix and then set the following registry key:

   On 32-bit Windows:

   HKEY_LOCAL_MACHINE\Software\Citrix\HDXRTConnectorLC
   Name:DisableMeetNowUIHandlers
   Type: REG_DWORD
   Data: 1 (enables this fix); 0 (disables this fix; all Meet Now UI handles are active; default)

   On 64-bit Windows:

   HKEY_LOCAL_MACHINE \SOFTWARE\Wow6432Node\Citrix\HDXRTConnectorLC
   Name:DisableMeetNowUIHandlers
   Type: REG_DWORD
   Data: 1 (enables this fix); 0 (disables this fix; all Meet Now UI handles are active; default)

   [From HDXRealTimeConn_Lync_1.4.200][#LC0006]

2. If a user makes a call from an optimized Lync client to another user, it takes about seven rings for the second user to see the signal and hear a ringtone.

   To reduce the amount of time before the user hears the ringtone, create the following registry key on the server:

   HKEY_CURRENT_USER\Software\Citrix\HDXRTConnectorLC\MediaEngine
   Value: TurnTCPAllocationTimeout
   Type: REG_DWORD
   Value: 2000 to 10000, default value is 5000 (milliseconds)

   [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0100]

3. Microsoft Lync is unable to receive calls in a XenDesktop session and the calls are recorded in a voicemail while using HDX RealTime Media Engine.

   To enable the fix, create the following registry key in Windows Server to disable bandwidth adaptation:

   HKEY_CURRENT_USER\Software\Citrix\HDXRTConnectorLC\MediaEngine
   Value: EnableBandwidthAdaptation
   Type: REG_DWORD
   Value: 0 to disable, 1 to enable

   After setting the registry key in Windows Server, start XenDesktop and then set the same registry key in XenDesktop. Then, exit Lync 2010 and make sure that HDXRTOptLC.exe is closed in Task Manager. When Lync 2010 is restarted, the changes take effect.

   [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0124]

4. The Microsoft Lync Optimization Pack might exit unexpectedly when placing conference calls.

   [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0127]

5. The Microsoft Lync Optimization Pack might exit unexpectedly when placing conference calls.

   [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0152]

6. When placing a conference call, Microsoft Lync might quit unexpectedly on a user device that has the Lync Optimization pack installed and when a Human Interface Device (HID) is used.

   [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0161]

7. Lync Optimization Pack fails to fetch the new certificate when an existing certificate expires.

   [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0191]

8. When the video call is established, the audio works properly but the video does not appear when a Cisco VCS 8.x device is used.

   [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0247]

9. If user1 makes a call from an optimized Lync client with HDX RealTime Media Engine to user2, who has a non-optimized Lync client without HDX RealTime Media Engine, user1 cannot hear the voice of user2.

   [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0264]

10. If the HDX Lync Optimization Pack is installed and users log on with Citrix Receiver for Windows, the following error message might appear:

    "1046 Virtual Driver is not loaded"

    [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0381]

11. When the HDX Lync Optimization Pack is installed, USB devices might be very slow in registering on Windows Embedded Standard 7.

    To enable the fix, you must install HDX RealTime Media Engine and HDX RealTime Connector on the user device and VDA.

    [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0509]

12. Conference calls might drop with Lync Optimization Pack installed.

    [From HDXRealTimeMediaEngine_Win_1.4.200][#LC0521]

Fixes from Replaced Hotfixes

1. We've reduced the delay in starting audio calls with participants outside your firewall.

   [From HDXRealTimeMediaEngine_Win_1.4.100]

2. Your users can now switch between terminals connecting to the same XenDesktop without having to restart RealTime Connector.

   [From HDXRealTimeMediaEngine_Win_1.4.100][#14039]

3. This fix addresses a security vulnerability. For more information, see Knowledge Center article CTX140605.

   [From HDXRealTimeMediaEngine_Win_1.4.103][#LC0099]

Installing and Uninstalling this Release

Notes:

• This release is packaged as a .zip file containing the Citrix RealTime MediaEngine.msi and HDX RealTime Connector LC.msi files. For more information about deploying msi files, see Microsoft article 884016 or visit the Microsoft Web site and search on keyword msiexec.
• Caution: Downgrades, also known as rollbacks, from this upgrade are not supported and might leave your systems in an unstable state. This upgrade does not patch the existing installation - it fully replaces it with a new installation. As a result, uninstalling this package removes the entire component from the computer. If the need arises to revert to an earlier version of the product, you must uninstall this package and then reinstall the earlier version of the product. Reverting to an earlier version of the product might result in the loss of settings you configure while this upgrade is installed.
• To install this package successfully, servers must not have registry modification restrictions in place.
• This hotfix might or might not prompt you to restart the server when the installation or uninstallation is complete. You must restart the server for the installation to complete.
• If the need arises to restore the original settings and functionality provided by this hotfix, you must uninstall the hotfix before reinstalling it according to the installation instructions below.

To install this hotfix:

1. Copy the file to a shared folder on the network.
2. Extract the compressed file and save the Citrix RealTime MediaEngine.msi and HDX RealTime Connector LC.msi files in a common share
3. If Citrix RealTime MediaEngine is already installed on the client machine, uninstall it before installing Citrix RealTime MediaEngine.msi
4. If HDX RealTime Connector LC is already installed on the server, uninstall it before installing HDX RealTime Connector LC.msi

To uninstall this hotfix:

1. From the Start menu, select Settings > Control Panel.
2. In Control Panel, double-click Programs and Features.
3. Highlight the hotfix you want to remove and click Uninstall.
4. Follow the directions on-screen.