When troubleshooting or setting up Outlook on your computer, knowing which version of Outlook you're using is valuable information. To identity the version of Outlook running on your computer, follow the steps below for your operating system. macOS Open Microsoft Outlook on your computer. Click the Outlook menu on the Mac's top menu bar. Select About Outlook. View your Outlook version in the "About Outlook" window that opens. In the screenshot below, the version is 16.89.3. Windows Open Microsoft Outlook. Click on File in the top left hand corner. Click on Office Account. View your Office in the Product Information section. View your version number in the "About Outlook" section. In the screenshot above, the version of Office is "Microsoft Office 365 Apps for enterprise." The version of Outlook of "Version 2409".