When you are invited to a meeting organized by Xinsto/NodeSpace, it will be over Microsoft Teams. Your meeting details will be in the meeting invitation under the details about the meeting. You will see the meeting ID, passcode, and a link to download Teams or join from a web browser.
Most email clients will delete the original invite once you accept it. When it's time for your meeting, you can find the details from your mail client's calendar.
You will be able to get a direct link to the meeting by opening the calendar appointment in Outlook.
If you're using Gmail or another email client, then the calendar appointment should look similar to something like the following. If you don't have a Teams Join button, you can click the link that will launch Teams or allow you to join from your web browser.