Here, you can find detailed information about calendars and data sources that you can overlay in Virto Calendar App for SharePoint.
With Virto Calendar App, you can overlay various calendars in a single calendar view. Let’s see which calendars you can use as data sources.
You can create an unlimited number of calendars with multiple data sources.
With Virto Calendar App, you can combine any number of Exchange Online shared and personal calendars into a single calendar. This is the fastest way to create a calendar overlay because no special fine-tuning is required for this data source.
If you use a shared mailbox to book meeting rooms in SharePoint, you can add it to the Virto Calendar App to track meeting rooms in a single place.
It is one of the most popular options for overlaying calendars. Use SharePoint lists (including lists in a calendar view) as data sources for your overlay. You can overlay an unlimited number of lists in a single view.
Do you have tasks in Microsoft Planner? Add these to your Virto Calendar App, too.
Public folders in SharePoint are designed for shared access. Since every public folder has a mailbox, it can be easily added to a Virto calendar as a data source.
An iCalendar or .ics feed is a unique calendar format for most calendar solutions. Generate iCal links and overlay events from Google Calendar or any other external calendar that supports iCalendar feeds.