
Select your Outlook profile and click OK.Enter Outlook /safe in the input field and press the OK button.Launch the Run tool by pressing Windows + R keys.You can run Outlook in safe mode to confirm if the problem is caused by add-ins. As a result, you may encounter the ‘cannot open the Outlook window’ issue. Sometimes, these add-ins interfere with Outlook. Outlook add-ins help in enhancing the user experience as they offer certain features that don’t exist in the base application. Try the following methods to resolve the ‘cannot start Microsoft Outlook’ error: 1. How to Fix “Cannot Start Microsoft Outlook” Error?

This error prevents Outlook users from using the application. Cannot open the Outlook window” error is one of the prevalent errors that Outlook users face.

For instance, the “Cannot start Microsoft Outlook. However, Outlook users occasionally run into problems with the application. To reactivate your Office applications, reconnect to the Internet.Microsoft Outlook is a powerful email client that offers many useful features for information management. If you don’t connect to the Internet at least every 31 days, your applications will go into reduced functionality mode, which means that you can view or print your documents but cannot edit the documents or create new ones. You should also connect to the Internet regularly to keep your version of Office up to date and benefit from automatic upgrades.

Internet access is also required to access documents stored on OneDrive, unless you install the OneDrive desktop app. For Microsoft 365 plans, Internet access is also needed to manage your subscription account, for example to install Office on other PCs or to change billing options. However, Internet access is required to install and activate all the latest releases of Office suites and all Microsoft 365 subscription plans.

You don’t need to be connected to the Internet to use Office applications, such as Word, Excel, and PowerPoint, because the applications are fully installed on your computer.
