From the left pane, check the box next to the SharePoint calendar to which you want to add an item.Once you have a SharePoint calendar connected to Outlook you can add or edit calendar events directly from within Outlook (if in SharePoint you have been assigned the appropriate permissions). Add an Event to a SharePoint Calendar Using Outlook You can use the check box to the left of the calendar name to hide the calendar from the side-by-side view. Your personal Outlook calendar will appear side-by-side with the newly connected SharePoint calendar. Click Yes to link the calendar to Outlook.Optionally, enter a Description for the calendar.In the Folder Name text box, enter a name for the calendar.A Microsoft Office Outlook dialog box will appear, click Advanced to open a SharePoint List Options dialog box.When prompted for 'Open Outlook? wants to open this application', click Open Outlook.If prompted to allow the website to run a program on your computer, click Allow.Select the Connect to Outlook option from the Connect & Export group on the ribbon.Click the Calendar tab at the top left of the screen to open the ribbon.Open the SharePoint calendar you wish to connect.