"I Will have a chat with our IT people to ask people to avoid using zoom."
Foolish. What works better combining VTC and easy join phone calls? Surely not Teams. Was on a 400+ person Zoom call that went great. Problem is likely in your network.
For one, Teams doesn't include dial-in/dial-out, that's another $1.50 per month per line (still cheaper than Zoom if you have Office 365 already).
But another, more important one is: the last time we tried using Teams/S4B meetings, if you are contacting a client where they are in a different Office 365 tenant, and the security settings are turned up on their tenant to not allow logging in as a "guest" to other tenants, they can't join your meeting. (or at least, not without launching an incognito window and reopening the meeting link) Azure AD tries to login as their user account, fails because they aren't allowed, and leaves them on an error message screen without any way for the meeting host to troubleshoot. Zoom, since it's out of band of anything that IT usually touches (unless you turn on the "only allow people in my organization to join this meeting" function), won't have this issue since the outsider will automatically be offered the choice of logging into a Zoom account or just giving a name for this conversation (as far as I've seen).
It's one of those scenarios where Microsoft being so entrenched in the environment actually lessens productivity. You can argue that people shouldn't be blocked from joining outside meetings, or that shadow IT is evil and should never be encouraged, but when security steps in the way of productivity, shadow IT usually naturally results, as so many SaaS vendors (Zoom, Basecamp, Dropbox) rely upon. Zoom acts like malware (to a degree) by installing to user-only directories and working around corporate security to make it easier for the end user to use the product. At a big company, approval for a video conferencing system could take months of PoCs, vendor meetings, implementation, and so on. But if you can just say "Join my Zoom meeting! It takes a minute! It integrates with Outlook so we don't have to even go to another website! And it's cheap!", then all of the corporate BS is cut through, and by time IT finds out, half the company is using it and they'll start paying for it so the enterprise stuff works (i.e. SSO).
(Basecamp is another good example of this. It gets tons of adoption by running in a browser window and only costing $99 per month for unlimited users, so it fits on a manager's expense account and user onboarding is super simple from there. and it's really easy to use.)
What's really funny is if a VP says, we should start evaluating enterprise conferencing software, get's down the road with the webex and friends sales teams, and then everyone tells them to go home because it's too late when they finally have the roll-out meeting or the feedback meeting - everyone is using zoom already.
