When using 32-bit Outlook on 64-bit Windows, you must use 32-bit Microsoft ODBC Data source Administrator.

Default Windows path is : C:\Windows\SysWOW64\odbcad32.exe

Windows Vista, Windows 7, Windows 2008 64-bit:

Default Microsoft ODBC Data source Administrator In Administrative Tools (Control Panel->Administrative Tools) will create datasources with 64-bit ODBC drivers, these drivers are not compatible with 32-bit applications!

Windows 8 / Windows 10 64-bit:

In Administrative Tools on a 64-bit Windows 8 / 10 operating system, there are icons for both the 32-bit and 64-bit ODBC Data Source Administrator dialog box.

more info :