Hotfix package name: XAE500R01W2K8X64057.MSP
For: Citrix XenApp 5 for Windows Server 2008 64-bit Edition with Hotfix Rollup Pack XAE500W2K8X64R01
Replaces: XAE500R01W2K8X64028, XAE500R01W2K8X64037, XAE500R01W2K8X64049
Date: May, 2012
Language supported: English (US)
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.

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. This fix addresses a security vulnerability. For more information, see Knowledge Center article CTX133159.

   [From XAE500R01W2K8X64057][#204450]

Fixes from Replaced Hotfixes

1. This fix addresses an issue with the wdica.sys file that can cause servers to become unresponsive.

   [From XAE500R01W2K8X64028][#250759]

2. Servers might experience a fatal exception related to Dynamic Client drive mapping, displaying a blue screen.

   [From XAE500R01W2K8X64028][#252333]

3. Servers might experience a fatal exception, displaying a blue screen, on wdica.sys.

   [From XAE500R01W2K8X64037][#260211]

4. This fix addresses a security vulnerability. For more information, see Knowledge Center article CTX133159.

   [From XAE500R01W2K8X64049][#LA0315]

5. The Terminal Services License Manager for Windows Server 2008 displays the client name as "Unknown" for the Terminal Services Client Access Licenses (TSCALs) issued.

   [From XAE500R01W2K8X64049][#LA0479]

Installing and Uninstalling This Release

Notes:

• Before installing this hotfix, make sure to verify the digital certificate chain validation of the MSP package. For more information, see Knowledge Center article CTX129998.
• 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.
• This hotfix might or might not prompt you to restart the server when the installation or uninstallation is complete. If you are using the Access Management Console, you must restart the server after installing or uninstalling this hotfix to ensure that the hotfix is added to or removed from the console's hotfix inventory list.
• 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. Open the Properties tab of the package and verify the digital certificate chain validation.
3. Close all applications.
4. Run the executable.
5. Restart the server.
6. If you are using the Access Management Console, restart the server to ensure the hotfix is added to the console's hotfix inventory list.

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.
4. If you are using the Access Management Console, restart the server to ensure the hotfix is removed from the console's hotfix inventory list.

Files Updated (All Dates/Times UTC)

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