Connecting other calendars to your Calendar account provides a way to bring all your events, meetings, and important events together for one view.
This means you can bring together some of your commonly used calendars, including Microsoft Exchange (Outlook). If you would like to connect your Microsoft Exchange Calendar to your Calendar account, follow the steps in this help guide.
First, open your Calendar account, log-in, and go to your "User Settings" menu. Once you select "User Settings" you'll see a number of options that include "Calendar Settings." Select this option so you can scroll down and begin the steps necessary to connect your Microsoft Exchange (Outlook) Calendar to your Calendar account.
In the screenshot below you can see where to access your user settings and calendar settings.
Next to the Outlook Calendar option is a blue "+" symbol. Select that to get started on connecting the two calendars.
As seen in the screen shot below a pop-up window will appear asking you to sign in to your Microsoft Live account as shown below. You'll enter your email address, phone number, or Skype ID followed by a second prompt for your password.
From there, you will get another screen where you will need to verify that it is okay to connect your Outlook Calendar with your Calendar account.
You'll also get an email to let you know that a new app has been added to your Microsoft Live account just to verify that you had indeed authorized such a connection.
Now you are ready to go. You'll see under "Connected Calendars" in your "Settings."