# Expected outage

Source: [https://docs.virtosoftware.com/docs/virto-calendar-web-part/system-requirements-and-installation/expected-outage/](https://docs.virtosoftware.com/docs/virto-calendar-web-part/system-requirements-and-installation/expected-outage/)
Product: Virto Calendar Web Part
Updated: 2026-08-12


The expected outage time ranges from two minutes to several hours, depending on your hardware and the number of SharePoint sites. We recommend that all Virto users perform upgrades or installations of the web part over the weekend.

For users with 100+ site collections, we suggest using **PowerShell** for the setup instead of **setup.exe**. Please [**contact our technical support**](mailto:support@virtosoftware.com) for further details.