Go to Control Panel and click on Mail option there.

• Click on View By option to see clearly Email icon and open Email Accounts and click on New.
• Now go to next option, Manual setup or additional server type and press Next. Choose Microsoft Exchange Server there and click Next. Fill out the following corresponding fields : Server: outlook.office365.com and add User Name. 
• Now go to Security Tab and uncheck the Encryption Option and select Anonymous Authentication. In the same screen,open  connection And check the box and choose Exchange Proxy Setting.
• Use this URL: outlook.office365.com. For proxy setting. also add ” msstd:outlook.com “in Only connect to proxy servers field. Check both box with On fast networks, and On slow networks and choose Basic authentication and press ok.
• A new small screen will be open for you,so go to Connections and press OK.
• Another small screen will appear, add User Name and Server to Add Account there.
• Now you can open your Outlook account easily.