This just started happening to me when I started working with a group that has their own zoom meetings room which is always on during business hours for co workers to use. The meeting room has its own URL and I use the desktop app.   It only happens in this meeting room.  I cannot join from my laptop and have to use an ipad.  I need to use the laptop for screen sharing etc.  

I can still join any other zoom meeting hosted by someone else on my laptop.  

I do not have Power Tools installed and I have read and applied every article I could find on this topic.  What else can I do?  

http://zoom.us/test doesn't help - unplug the internet while it's running
and it continues to display the camera, so it's not doing anything over
the internet at all, also it doesn't test the microphone.
When I did an actual Zoom session, video and audio broke up continually
then audio stopped altogether - it was a complete disaster.
The whole point of Zoom is that it's over the internet - a test that
doesn't go over the internet is not useful.
Signing into a view-only conference doesn't help much as it doesn't
detect problems with my camera, microphone, or uplink; also the available
bandwidth may be enough for one-way video but flake out for two-way.

Zoom should host an always-on dummy conference that just sends back what
it gets from your camera and microphone so you can verify everything is
working in both directions over the internet, as well as letting you
see how you look and sound to others. Where is that?
Is there any alternative website that does automatic two-way testing?

Hi,

Recently we faced several cases which ZOOM client has prompted the window for Proxy Settings requested to key in "User Name" & "Password". As we are SSO for login and shouldn't be required key in any credentials.

Please advise how to solve this.

Thanks 

Ricky