From security perspective, Companies do not like the fact that Zoom was developed in China and the vast majority of its R&D is still in China. China has different rules on security than many other countries. Particularly surrounding intellectual property. https://www.sec.gov/Archives/edgar/data/1585521/000119312519...

"Top of page 21- In addition, we have a high concentration of research and development personnel in China, which could expose us to market scrutiny regarding the integrity of our solution or data security features. Any security compromise in our industry, whether actual or perceived, could harm our reputation, erode confidence in the effectiveness of our security measures, negatively affect our ability to attract new customers and hosts, cause existing customers to elect not to renew their subscriptions or subject us to third-party lawsuits, regulatory fines or other action or liability, which could harm our business."