Merge Outlook Calendar is a free Chrome add-on developed by Tyler Elliott. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools program. This extension aims to enhance the user experience while using O365 Outlook on the web by defaulting to a merged view of the calendar.

By default, when using O365 Outlook on the web, the day view of the calendar splits all of your calendars into multiple columns. Merge Outlook Calendar changes this behavior and combines all the calendars into a single view. This allows users to have a more consolidated and cohesive view of their schedule.

Although the extension sets the merged view as the default, users still have the option to toggle between the split and merge views using the split/merge toggle located in the upper right corner.

With Merge Outlook Calendar, managing multiple calendars becomes more streamlined and efficient, providing users with a unified view of their schedule in O365 Outlook on the web.