# System/Developer Requirements

Source: [https://docs.virtosoftware.com/docs/calendar-overlay-pro/administration-and-system-requirements/system-developer-requirements/](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administration-and-system-requirements/system-developer-requirements/)


## **Operating System**

Microsoft 365 / SharePoint Online & Microsoft Teams

## **Browser**

Microsoft Edge, Microsoft Internet Explorer 11, Google Chrome, Mozilla Firefox.