Everybody is talking about E2EE in Web- and Video-Conferencing. OK.
But how to make sure, the person on the other (encrypted) end really is who she/he claims to be?
How about "Cisco Certified Conferencing-IDs" ?
I think about Validation-Certificates (?) for Webex-Accounts that allow to promise:
If you meet Mr. XYZ on Webex you are garanteed that it actually is Mr. XYZ.
The 2FA-Feature is suggested below, may become handy here...