How to Find out If You're Running 32-Bit or 64-Bit Outlook

Know your version so you can install compatible add-ins and plug-ins

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Updated on February 8, 2021

What to Know

In Outlook, select File > Office Account > About Outlook > at the top of the box, the version number and 32-bit or 64-bit will display.
In Outlook 2010, select File > Help.

This article explains how to determine if you have 32-bit or 64-bit Outlook. Instructions apply to Outlook for Microsoft 365, Outlook 2019, Outlook 2016, Outlook 2013, and Outlook 2010. Outlook 2007 and older versions were available only in 32-bit versions.

What Version of Outlook Are You Running?

The 64-bit version of Office is automatically installed unless you select the 32-bit version before beginning the installation process. If you're unsure which version of Outlook you have, here's how to find out if you have the 32-bit or 64-bit version of Outlook:

Select File > Office Account.
Select About Outlook.
The top of the About Outlook box shows the version number and 32-bit or 64-bit distinction.

Outlook in Office 2010 has a slightly different interface. There's no Office Account, option. Instead, select Help. The product version displays on the right side of the page along with whether it's 32-bit or 64-bit.

Now that you know which version of Outlook you're using, you'll be able to select the correct add-ins and plug-ins for your system.

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