Operating system
The required operating system is Windows 2003 Server. Client versions of Windows, such as Windows XP, cannot be used because Citrix XenApp requires Terminal Server, which is not available on client versions of Windows.
The recommended version of Windows Server 2003 is Enterprise Edition. You can also use Windows Server 2003 Standard Edition, but you might need to reduce the maximum heap size for the Java virtual machine that is used by the Message Broker Toolkit.
Software prerequisites
Citrix XenApp (previously known as Citrix Presentation Server 4.0 or 4.5) and its prerequisites must be installed on the Windows 2003 server.
Hardware prerequisites
The server must have enough CPU, RAM, disk space, and network bandwidth for each concurrent user. Performance depends on the tasks that are being performed, and on the hardware, software and networking setup. As a guide, the server should have a minimum of 1 GB of RAM per concurrent user and at least 4 GB of RAM in total. If the tasks require frequent disk access, it should help performance to have a separate physical disk for each user so that they do not slow each other down.
Note: Although there is a maximum 75 number of users who are authorized to use
an XenApp Fundamentals server, the number who can use XenApp Fundamentals
at the same time depends on the limitations of your server hardware (such as total
memory, processor speed, disk space, and so on).
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