Zoom, WebEx and other video conferencing services are certainly helpful during the COVID-19 pandemic. And scammers are exploiting the tremendous growth of video conferencing services by launching phishing campaigns aimed at getting users to hand over login credentials.
Another newer business scam is an email malware delivery campaign that sends an email from a potential client with a request for a quote, says they are available via Zoom, and includes a fake Excel file that supposedly has calendar options for the call. When the Excel file is opened, the recipient is asked to enable macros which starts the attack.
You can learn more about this latest round of dangerous activity here: https://www.helpnetsecurity.com/2020/04/21/phishing-zoom-webex/