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Installing
You can install HCL Client Application Access on Microsoft™ Windows™ or Mac OS systems.
Installing on Citrix XenApp server
Administrators can follow these steps to install HCL Client Application Access (HCAA) on a Citrix XenApp server.

Installing
You can install HCL Client Application Access on Microsoft™ Windows™ or Mac OS systems.
- Dual client installation scenarios
  HCL Client Application Access (HCAA) and HCL Notes release 11.0 or later can co-exist on your system. In this case, you can use either Notes® or HCAA. When you open an application and Notes is not running, the application is opened in HCAA.
- Installing on Microsoft Windows™
  Follow these steps to install HCL Client Application Access (HCAA) on Microsoft™ Windows™ if the installation isn't done for you.
- Installing on Mac OS
  Follow these steps to install HCL Client Application Access (HCAA) on Mac OS if the installation isn't done for you.
- Installing on Citrix XenApp server
  Administrators can follow these steps to install HCL Client Application Access (HCAA) on a Citrix XenApp server.
  - Migrating Notes data to HCL Client Application Access on Citrix
    If you currently use HCL Notes® on Citrix XenApp but don't want to continue to do so, complete the following steps to enable HCAA to reuse the Notes data directory.
- Upgrading to the current release
  You can upgrade to the current release of HCL Client Application Access (HCAA) from a previous HCAA release. If you are an on-premises user with HCAA currently installed, upgrades occur automatically through the Auto Update Service.

Installing on Citrix XenApp server

Administrators can follow these steps to install HCL Client Application Access (HCAA) on a Citrix XenApp server.

Before you begin

Make sure you have installed a supported version of Citrix XenApp.
Read the topic Dual client installation scenarios to understand the extent to which HCAA and HCL Notes® versions can coexist.

About this task

If Notes® is already installed and you want to uninstall it and migrate the data to HCAA, don't use this procedure. Instead see Migrating Notes data to HCL Client Application Access on Citrix.
Note: If you use Notes® 8.5.x, you must uninstall it because it can't coexist with HCAA.

Procedure

Download the HCAA 3.0 install kit.
Log on to the Citrix server as the Administrator.

Run the HCAA setup.exe in one of the following ways:

Your goal	Command to use
Multi user installation with one data directory	`setup.exe /v"SETMULTIUSER=1 CITRIX=1"`
Multi user installation with two data directories: a common directory (for shared files such as templates) and a user directory for user-specific data	`setup.exe /v"SETMULTIUSER=1 CITRIX=1 MULTIUSERBASEDIR=C:\<user_data_directory>\!USERNAME! MULTIUSERCOMMONDIR=C:\<common_data_directory>"`