Dual client installation scenarios

IBM® Client Application Access (ICAA) and IBM Notes® release 9.0 or later can co-exist on your system. In this case, you can use either Notes or ICAA. When you open an application and Notes is not running, the application is opened in ICAA.

The following table describes dual-client installation scenarios, both supported and unsupported. Review these scenarios before you install ICAA.

Note: In the following table, ICAA refers to ICAA release 1.0.1 or later.

Table 1. Dual-client installation scenarios
Existing clients	New installation	Results
Notes 8.5.x or earlier	ICAA	On Mac OS: ICAA and Notes co-exist and ICAA uses the Notes data directory and Preferences file. On Windows or Citrix XenApp: ICAA can't co-exist with Notes 8.5.x or earlier releases. Before you install ICAA, you must either upgrade to Notes 9.x or uninstall Notes and use ICAA only. If you want to uninstall Notes, before you install ICAA, see one of the following topics for steps to reuse your Notes data: Migrating Notes data to IBM Client Application Access on Windows Migrating Notes data to IBM Client Application Access on Citrix
Notes 9.x or later without the Notes Browser Plug-in	ICAA	ICAA and Notes co-exist and ICAA uses the Notes data directory (and on Mac OS the Preferences file).
Notes 9.x or later with bundled Notes Browser Plug-in	ICAA	The Notes Browser Plug-in is removed. ICAA and Notes co-exist and ICAA uses the Notes data directory and on Mac OS the Preferences file.
Stand-alone Notes Browser Plug-in 9.0.1 FixPack 6 or earlier	ICAA	The Notes Browser Plug-in is uninstalled. ICAA reuses the Notes data directory and on Mac OS the Preferences file.
Notes 9.x or later and ICAA	ICAA upgrade	ICAA is upgraded and continues to co-exist with Notes.
Notes 9.x or later and ICAA	Notes Fix Pack upgrade	Notes is upgraded with the Fix Pack and continues to co-exist with ICAA.
Notes 9.0.0 and ICAA	Notes 9.0.1 upgrade	You must uninstall ICAA, upgrade Notes to 9.x or later, and reinstall ICAA.
ICAA only	Notes 9.x or later	On Mac OS, a clean installation of Notes is supported when ICAA is already installed. On Windows or Citrix XenApp: a clean installation of Notes is not supported when ICAA is already installed. To use both Notes and ICAA, uninstall ICAA, install Notes 9.x or later, then reinstall ICAA.