How to change outlook working offline? To change Outlook from working offline to online, follow these steps:

1. Open Outlook and go to the Send Receive tab.
2. Check if the Work Offline button is selected. If it is, click on it to disable it.
3. If the Work Offline button is not visible, navigate to the File tab and select Options.
4. In the Options window, select the Advanced tab and scroll down to the Send and receive section.
5. Click on the Send/Receive button and ensure that the "Include this group in Send/Receive" box is checked.
6. Select the account you want to use and ensure that the "Offline" checkbox is not checked.
7. Click OK to save your changes and return to the main Outlook window.

Once these steps are completed, Outlook should be able to connect to the server and send/receive emails. If you continue to have issues, check your internet connection and verify your login credentials with your email provider.