First introduced in SharePoint 2010, the Calendars Overlay feature is a function of the Calendar List which allows users to view the data of several different lists, such as Calendar lists, Tasks lists and Microsoft Exchange calendars, all in one easy-to-read, color-coded Calendar List. In this blog topic, I’ll walk through the steps needed to display event data from a different Calendar list and Microsoft Exchange in one calendar view of a Calendar List in SharePoint 2013.
To overlay a SharePoint calendar with another SharePoint calendar, follow these steps:
1. In a SharePoint calendar, choose the Calendar tab and then select Calendar Overlays.
2. In the Calendar Overlay Settings page, choose New Calendar. New Calendar must be an existing calendar in the site collection (i.e. Human Resources).
3. In the Name and Type section, type the Calendar Name and then select SharePoint.
4. In the Calendar Overlay Settings section, type a Description for the calendar (optional), and change the Color theme for the calendar (optional). Tip: Selecting different colors for different calendars makes it easier to distinguish which calendar an event is from.
5. Type the Web URL for the SharePoint site that the calendar is in, such as https://www.anexient.com/Committee/calendar, and then select Resolve. If the calendar is in the same site as the group calendar, Web URL will already be populated accurately.
6. Select the List drop-down arrow and then select the calendar that you want to add to the calendar.
7. Select the view that you want to use from the List View options.
8. If you want the overlaid SharePoint calendar to always display in the SharePoint group calendar, select Always Show.
9. Click OK to accept the overlay specification, and then click OK to complete the process. The Calendar is now provisioned with an additional calendar.
The following procedure describes how to overlay an Exchange calendar onto a SharePoint calendars for a SharePoint calendar. After you overlay the calendar, you can use this calendar to create a special calendar view. Important: You can only overlay your own Exchange calendar. That is, the Exchange calendar overlay works with the account credentials of the user who is current logged on. SharePoint uses the account information of the current user to retrieve calendar data from the Exchange Web Service.
To overlay an Exchange calendar, follow these steps:
1. In a SharePoint calendar, in the ribbon, on the Calendar tab, click Calendar Overlays.
2. In the Calendar Overlay Settings page, click New Calendar.
3. In the Name and Type section, type the Calendar Name and select Exchange.
4. In the Calendar Overlay Settings section, type a Description for the calendar (optional), and change the default Color theme for the calendar (optional).
5. Screenshot of the Calendar Overlay dialog box in SharePoint. The dialog box shows the Calendar name, calendar type (Exchange), and gives the URLs for Outlook Web Access and Exchange Web Access.
6. Enter your Outlook Web Access URL. Click Find to automatically fill in web address for and Exchange Web Service URL. If Find does not work in your environment, type the URLs manually or contact your Exchange administrator for assistance.
7. If you want this Exchange calendar to always appear with the SharePoint group calendar, select Always Show.
8. Click OK and then click OK again.
9. The Exchange calendar is now provisioned