# Step-by-Step Installation Instructions

Source: [https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/)
Product: Virto Calendar App
Updated: 2026-08-11

## Pages
- [Step 1: Install Virto Calendar App](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/step-1-install-virto-calendar-app/index.md) — Walks admins through installing Virto Calendar App from Microsoft AppSource and adding it to a SharePoint page or Teams.
- [Step 2: App Authorization and Permission](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/step-2-app-authorization-and-permission/index.md) — States that only a Tenant Administrator can complete app authorization and links to the detailed permission request steps.
- [Step 3: Assigning Roles](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/step-3-assigning-roles/index.md) — Explains why administrators must appoint a License Manager or Calendar Manager after installing Virto Calendar App.
- [Step 4: Calendar Permission Management](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/step-4-calendar-permission-management/index.md) — Describes how Virto Calendar App permissions inherit from SharePoint, Exchange, and Teams, and how to assign managers.
- [Additional step for Safari users](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/additional-step-for-mac-users/index.md) — Explains how Safari users on Mac disable Prevent Cross-Site Tracking so Virto Calendar can use cross-domain cookies.
- [Additional step for Chrome and Edge users](https://docs.virtosoftware.com/docs/calendar-overlay-pro/administrators-guide-to-installation-and-configuration/step-by-step-installation-instructions/additional-step-for-chrome-and-edge-users/index.md) — Shows Chrome and Edge users how to allow third-party cookies for their tenant domain so Virto Calendar App loads correctly.