Hotfix package name: XA600R02W2K8R2X64091.MSP
For: Computers running Windows Server 2008 R2 with Citrix XenApp 6, Hotfix Rollup Pack XA600W2K8R2X64R02 installed
Replaces: XA600R02W2K8R2X64004, XA600R02W2K8R2X64016, XA600R02W2K8R2X64024, XA600R02W2K8R2X64042, XA600R02W2K8R2X64080, XA600R02W2K8R2X64084
Date: November, 2015
Languages supported: English (US), German (DE), Spanish (ES), French (FR), Japanese (JA), Simplified Chinese (SC)
Readme version: 1.00

Readme Revision History

Important Notes about This Release

• Note: As a best practice, Citrix recommends that you install this and other hotfixes only if you are affected by the specific issues they resolve. Otherwise, Citrix recommends that you wait for the next hotfix rollup pack for your product release. Hotfix rollup packs consolidate most previously released hotfixes and allow you to update systems in a convenient, single installation.
• Important: Installing this hotfix over an ICA session is not supported but you can install it through a remote desktop session using an administrator account.
• Caution! This release may require you to edit the registry. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

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.

Where to Find Documentation

This document describes the issue(s) resolved by this release and includes installation instructions. For additional product information, including system requirements, see XenApp 6 on the Citrix Product Documentation site.

New Fixes in This Release

1. This fix addresses an issue that prevents the Windows logon screen of XenApp 6.0 servers from displaying the smart card tile.

   [From XA600R02W2K8R2X64091][#LC3168]

Fixes from Replaced Hotfixes

1. A smart card cannot be read if a published desktop gets locked.

   To enable this fix, you must create the following registry key:

   HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\SmartCard
   Name: EnableCtxCleanup
   Type: REG_DWORD
   Data: 1

   [From XA600R02W2K8R2X64004][#LA2343]

2. Sessions can become unresponsive when smart card services are running but no smart card reader is present.

   [From XA600R02W2K8R2X64016][#LA3469]

3. Improperly terminated smart card transactions can leave orphaned sessions running on the server and cause new sessions to become unresponsive during logon. Several processes (winlogon.exe, csrss.exe, and logonui.exe) keep running in the orphaned sessions.

   To enable the fix, you must set the following registry keys:

   HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\SmartCard
   Name: TransactionTimeoutEnable
   Type: REG_DWORD
   Value: 1 (enable)

   HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\SmartCard
   Name: TransactionTimeoutValue
   Type: REG_DWORD
   Value: <this value should be at least 10 seconds more than the transactionTimeoutValue>

   HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\SmartCard
   Name: SendRecvTimeout
   Type: REG_DWORD
   Value: Minimum timeout value, in seconds; should be 30 seconds or more. Any lesser value defaults to 30 seconds. This value must be at least 10 seconds more than "TransactionTimeoutValue".

   [From XA600R02W2K8R2X64024][#LA0983]

4. Two-factor USB token authentication for smart cards might fail with the following error message:

   "System could not log you on, requested key container does not exist on smart card."

   [From XA600R02W2K8R2X64024][#LA3620]

5. The smart card tile might fail to appear after dismissing the Windows logon banner message. As a result, only the option of "Other User" is available for users to select.

   [From XA600R02W2K8R2X64024][#LA4001]

6. When using smart card authentication, sites in the Intranet zone do not prompt for credentials and fail to load if protected mode is enabled for the Intranet zone. To enable this fix, you must set the following registry keys:

   • On 32-bit Windows
     HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\SmartCard
     Name: SupLowIntegrityProc
     Type: REG_DWORD
     Data: 1
   • On 64-bit Windows
     HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\SmartCard
     Name: SupLowIntegrityProc
     Type: REG_DWORD
     Data: 1

   [From XA600R02W2K8R2X64042][#LA4501]

7. Removing a smart card from the reader might not result in the disconnection of the session.

   [From XA600R02W2K8R2X64080][#LA4588]

8. The Citrix Smart Card Service might cause very high CPU usage. To correct this issue, restart the Citrix Smart Card Service.

   [From XA600R02W2K8R2X64080][#LA5919]

9. After logging on to a server by using a smart card, the server can become unresponsive at the Welcome screen and refuse to accept new sessions. Restarting the Smart Card Service resolves the issue and the server continues to accept new sessions.

   Configuring the following registry keys might not be necessary if fix #LA0983 is already installed and you configured the registry settings during the previous hotfix installation.

   HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\SmartCard 
   Name: TransactionTimeoutEnable
   Type: REG_DWORD
   Value: 1 (enable)

   HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\SmartCard
   Name: TransactionTimeoutValue
   Type: REG_DWORD
   Value: <any value more than 5 seconds>

   HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\SmartCard
   Name: SendRecvTimeout
   Type: REG_DWORD
   Value: Minimum time-out value, in seconds; should be 30 seconds or more. Any lesser value defaults to 30 seconds. This value should be at least 10 seconds more than the "TransactionTimeoutValue."

   [From XA600R02W2K8R2X64080][#LC0910]

10. The Citrix Smart Card Service might become unresponsive and the users might not be able to log on to the server until the service is restarted.

    [From XA600R02W2K8R2X64084][#LC1276]

Installing and Uninstalling This Release

Notes:

• This hotfix is packaged with Microsoft Windows Installer 3.0 as a .msp file. For more information about deploying .msp files, see Microsoft article 884016 or visit the Microsoft Web site and search on keyword msiexec.
• This installer program complies with Microsoft User Account Control (UAC). If UAC is enabled, you must run the installer program in elevated mode; that is, with administrative privileges enabled. For more information about UAC, see Microsoft TechNet or visit the Microsoft Web site and search on keyword UAC.
• To install this hotfix successfully, servers must not have registry modification restrictions in place.
• Slipstreaming - installations of the XenApp Server base product packaged with one or more individual hotfixes - is not supported and might leave servers in an unstable state.
• You must restart the server after the installation of this hotfix completes. However, if you are installing multiple hotfixes at the same time, there is no need to restart the server after the installation of each hotfix. It is sufficient to restart the server after the installation of the final hotfix completes.
• 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 hotfix package to an empty folder on the hard drive of the server you want to update.
2. Close all applications.
3. Run the executable.
4. Restart the server. This ensures that the installation completes and that the hotfix is added to the hotfix inventory list of the Delivery Service Console.

To uninstall this hotfix:

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

Files Updated (All Dates/Times UTC)