SharePoint allows Lists (i.e., Document Library, Calendar, Task) to be connected to Outlook. Outlook must be installed to follow these instructions.
1. Log into the SharePoint site and click any list. For this example, we will use the Calendar. Click Calendar in the Quick Launch Toolbar.
2. On the ribbon at the top, under Calendar Tools, click Calendar.
3. Click Connect to Outlook. Several options will pop up from the system. Read them and click Yes.