I'm in the U.S. and opened case #10564658 about this topic.
I received an email from RingCentral on Monday 4/6 saying that by Sunday 4/12 I need to have my network admin whitelist the IP address 188.8.131.52/32.
After contacting support to clarify, it sounds like they are saying anyone I invite to a RingCentral Meeting (internal or external) will also have to whitelist this IP address in their firewall or they may not be able to join the meeting, but I'm worried their may be some miscommunication here.
I can't imagine setting up a meeting with a new recruit and sending them a link to a RingCentral meeting along with instructions on how to whitelist an IP address. Is this real?