Teams - no video in meetings

[steveg]

Starting yesterday we have stopped having video working in most of our teams meetings.

 

No issues with the cameras, they all work fine.

 

The meeting starts fine, audio works fine and occasionally some people do get video, but most just get the initials / picture of people and audio. It seems to work ok for external people.

 

If I do a call through teams rather than a meeting, the video works perfectly.

 

There seems to be other reports of this on line with no solutions. I've tried removing and re-installing teams, but it also has same issues on an ipad, so I'm guessing it's a network / filtering issue?

[EddyAllen]

I would assume that's definitely a network issue. I would check the ports that Teams is set to use in your Teams Admin Center, by default it will try high port numbers in the range of UDP 50000 - 59999 and if it can't use those it it will go to UDP 3478-3481. Depending on your firewall you might also have a preset application filter in place as I've seen in SophosXG which you might need to enable. It might also be that you are running out of ports if you are having lots of people in a meeting at once, again you can increase the range of this in the Admin Center of Teams on Office365.com. I would probably give a port each to the maximum number of concurrent users and then overprovision by 50%.

[steveg]

I've had more of a play with this today and if I have a meeting with only ipads, it works fine. I tried from my phone to an ipad (both on school wifi) all was fine. We had an online demo today using Teams and had to join using our ipads.

 

If I have a meeting with an ipad to a pc, or pc to pc it doesn't work. So this would likely suggest it is either the client software or something on the pc, although no changes have been made to configuration this week.

 

Calls from a pc still work fine, so video can get through, just not when doing it as a meeting!

 

We have on-site smoothwall box for filtering in bridging mode, with firewall being handled by the local authority, who aren't aware of any problems in any other schools.

 

Will build a couple of off-domain windows pc's now and try it on there to eliminate any configuration issues

[MartinByard]

Might be worth making sure everything is running on uptodate clients, incase something has snuck into a later one that isnt supported by earlier versions ?