Hi, I'm Bhavik. Welcome to JustAnswer. I'm reviewing your question now, and will reply back ASAP.
Notice that when Outlook is set to Work Offline, the button is highlighted.
2. Click Work Offline to return to working online.
After you reconnect to the server, the Work Offline button will have a plain background.
Let me know if you face any problem in doing it. Also keep me posted about how it is working after following above steps.