MS Outlook is an email client used to access and manage multiple email accounts added to it. If the Outlook Online not working on your Windows computer, follow the troubleshooting steps mentioned below.
On your Windows computer, verify whether you have a standard Internet connection.
To check it out, open the default browser and open any webpage.
Next, open the Outlook app by giving a right-click on the Outlook shortcut icon on the desktop.
Check if it shows any Working Offline or Disconnected Outlook is not connected to the Internet so the Outlook online not working. message at the bottom of the window.
Click the Send/Receive tab and select the Work Offline option to reconnect.
Make sure that Work Offline is toggled off.
If the problem persists, install the Windows updates.
To do so, click the Start menu available at the bottom-left corner of the screen.
Click the Settings icon in the pop-up menu to open the Settings app.
Alternatively, you can launch the Settings app by pressing the Windows + I shortcut keys.
Click the Update & Security tab in the Settings window and select Windows Update from the left-side panel.
Click on Check for updates and then wait until the update is completed.
To check for Office updates, launch the Outlook app and click the File tab at the top-left corner of the screen.
Click the Office Account tab from the left-side panel and select the Update Options option on the right-side panel.
Carry out the on-screen prompts to complete the update.
If the problem remains unsolved, check the server settings of the email account configured in the Outlook app.
If necessary, remove your email account and add it again.