Since that data is not available on Graph API and available on a website, there's only one thing I can do – parse HTML. You may be thinking that parsing HTML is hard, but well, it isn't (not anymore at least!). Some time ago, I released PSParseHTML PowerShell Module. Then one day, Anthony Howell wrote to me on Twitter that he will be live streaming parsing HTML table and if I would be interested in ConvertFrom-HTMLTable cmdlet for my PSParseHTML module. Well, yeah! Of course, I was interested! After talking a bit, he used .NET libraries that are bundled in PSParseHTML to deliver the function that does just that. It parses HTML and extracts all tables from HTML. It wasn't perfect, but you can't expect perfection from a 1-hour live stream. But his work gave PSParseHTML additional functionality, that I took and expanded upon. After working on that function for a bit, I've improved it to support most of the HTML tables that I needed, even those a bit more complicated with spanned rows. Currently, PSParseHTML supports the following commands: