To see your meeting in the Powow calendar, you must add email@example.com to the participants. Conference tools like Zoom and WebEx also require dialing data. The invite to firstname.lastname@example.org should come from the same email as registered or aliased on your account.
Watch the Powow meeting invite walkthrough for step-by-step instructions.
If you invite Powow to MS Teams with a URL you need to connect the integration first. Follow these instructions.