Quick-Tip for checking if your Outlook client is the 32-bit or 64-bit client.
When installing various Microsoft Outlook plugins like the Microsoft Office Outlook Hotmail Connector as an example, you may need to know if you’re running the 32-bit or 64-bit version of Outlook. Here’s how to quickly check what version you have installed.
Open Outlook and Click File > Help
As shown above, if y0u’re running the 64-bit version, it will be displayed next to the version number under the About Microsoft Outlook section of the Help menu.