This video (Microsoft Stream- login with HFC credentials) shows how to use the web based email client to forward a meeting invite to someone knew without sending the invitation to everyone.
I had asked for people who wanted to attend a monthly walk-on committee meeting. I did not want to keep a list of who responded and send them an email at a later date because those folks might wonder what is happening and I am not organized enough to do that carefully. I also did not want to resent the invite 10 times to the folks already on the committee. My solution is in the video.