1/ In 2018, Zoom began allowing certain users to covertly access LinkedIn profile data about other meeting participants — without notifying them.
Even if a person used a pseudonym, the Zoom system could identify them and link them to their profile data. http://www.nytimes.com/2020/04/02/technology/zoom-linkedin-data.html

2/ When @Aaron_Krolik tested the Zoom data-mining feature for our story, he found that it displayed his LinkedIn profile to another user -- even when he had signed into the Zoom meeting under the pseudonym "I am not here."
i.e., Zoom overrode his explicit privacy choices.

Neither Zoom's privacy policy nor its terms of service explicitly disclosed the fact that it could show your Linkedin profile data to other meeting participants. It also did not disclose that it could send personal data about participants in private Zoom meetings to LinkedIn.

4/ In fact, Zoom suggested just the opposite: that you did not have to post your real name.
“Enter the meeting ID number and your display name,” one section on Zoom’s Help Center said. “If you’re signed in, change your name if you don’t want your default name to appear.”

5/ As @mr_james_c points out, Zoom's user-profiling feature is standard for enterprise software.
But now Zoom has become the de facto platform for conducting our business and personal lives during the pandemic -- and many people would not expect to be profiled on a Zoom meeting.

6/ LinkedIn said that Zoom could surface data only for those users who turned on a LinkedIn setting enabling "everyone" who already had their email address to find their profile.
But the user-profiling system worked by matching the email addresses that Zoom supplied to LinkedIn.

After we contacted Zoom and LinkedIn about this, the companies said they would halt the user-profiling feature.
Zoom later posted a blog item saying it had shut down the feature "after identifying unnecessary data disclosure."
for the record: @aaron_krolik did the "identifying"