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™: You must uninstall Notes before you install ICAA. ICAA can't co-exist with Notes 8.5.x or earlier releases. For steps to reuse your Notes data in ICAA, see Migrating Notes data to IBM Client Application Access (Windows) before you install ICAA.
Notes 9.x or later without the Notes Browser Plug-in	ICAA	ICAA and Notes co-exist and ICAA uses the Notes data directory.
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.
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.
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, and reinstall ICAA.
ICAA	Notes 9.x or later	On Mac OS, a clean installation of Notes is supported when ICAA is already installed. On Windows, a clean installation of Notes is not supported when ICAA is already installed. To use both Notes and ICAA, uninstall ICAA, install Notes, then reinstall ICAA.