To find out which version of Outlook is installed on your computer, do the following:
In Outlook, click File.
Click Office Account.
If you don't see Office Account, option, click Help. You'll see the product version on the right side of the page.
You'll find the version and build number under Product Information.
If you need to know whether you're using the 34-bit version or the 64-bit version of Outlook, click About Outlook.
The top of the About Outlook box shows the version number and whether you're using 32-bit or 64-bit.
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