How do I Export Outlook Calendar to ICS Format?

I recently had to export Outlook Calendar to ICS because our team moved to a mixed environment where some members use different calendar apps. The manual export option inside Outlook is straightforward for personal use, but in business scenarios with archived PST backups, it becomes difficult to manage, especially when ensuring that recurring meetings, notes, and participant information remain intact after transfer. I needed a method that could process several PST files together and also verify the content before saving, since losing scheduling data would create confusion. While exploring options, I focused on tools that allow structured extraction of calendar folders, preserve metadata fields, and provide a preview panel so nothing important gets skipped during conversion. Eventually, I tested the SysInfo PST Converter Tool, which includes smart scanning, bulk file loading, and the ability to maintain original calendar structure while exporting into ICS format. It also supports multiple output formats for future flexibility. Compared to repeating manual exports one by one, using a specialised converter made the overall migration workflow much more organised.