I have new SIP lines in my invitations for a month. I never used SIP and never switched it. How can I switch it off?

Über SIP beitreten
89867821024@zoomcrc.com

Über H.323 beitreten
162.255.37.11 (USA
Westen)
162.255.36.11 (USA
Osten)
213.19.144.110 (Amsterdam
Niederlande)
213.244.140.110 (Deutschland)

When I start the live transcript function, even if I have it set to not allow participants to save a copy, I get a notice that "The account owner and everyone in the meeting can save this transcript and share with apps and others."  Does anyone know what apps this is referring to and why I would even get this notice if people can't save the text file?

I occasionally will host meetings in the evening with friends. What I've always done in the past is I'll email them the zoom link that is listed in the Zoom app as my default meeting link. I just cut and paste that link into an email. No one ever needed to use a meeting ID, or a password, or to log in to anything. They could simply click on the link, which would launch  Zoom on their device and they'd be in the meeting automatically. For over a week now, no one has been able to join my meetings and everyone is upset. Note that the same people who can't get into MY meetings, can still get into our mutual organization's meetings without difficulty. It's just MY meetings they cannot join.

What's going on?

Note that a lot of the people I am dealing with are not at all tech-savvy, some may have cognitive disorders. They aren't all on facebook, I don't personally have all of their email addresses (the organization we are with keeps them confidential, but they have my permission to distribute my zoom link to their users, since I run activities over zoom). This has never ever been a problem in the past.