
Select OK.In this article, we will discuss the basics of MS Office KMS activation (this guide applies to the volume editions of Office 2021, 2019, and 2016, including Project and Visio). You can run the /resetnavpane command to remove all customizations to the navigation pane and check whether Outlook still won’t open.Ĭlose Outlook, select Start > Run, and type Outlook.exe /resetnavpane. The navigation pane displays your folder list and icons to move. See our in-depth guides on what to do when Outlook can’t access data files and how to repair an Outlook PST file that’s damaged or corrupted. You can use the scanpst.exe (Inbox Repair Tool) to scan your data files and repair errors. Occasionally, some of the data (PST) files Outlook stores may become corrupted. Note: Back up your data files before removing your old profile because selecting Remove means all your offline cached content will be deleted. Select OK and check if Outlook starts normally with the new profile name.

Find out also how to fix an intermittent internet connection in Windows 10 or connect your computer to a mobile hotspot when your router isn’t working. If the connection works but you can’t open Outlook, your browser or other apps, see our guide on what to do when you can connect to a wireless router but not the internet.

After each step, try to open Outlook and check if it works again. Whatever the reason for Outlook not opening on your device, there are several simple and advanced troubleshooting steps you can use to fix Outlook issues.

There are several reasons why Outlook might not load or work correctly.
