Most folks know this is easily defeated typically by viewing the content on another device (eg via casting it, remote desktop, phone mirroring, etc) or viewing it from within a VM, and then using the native screen capture functionality on the viewing device to record/screenshot whatever you need.
That being said - guessing they are doing this for their enterprise customers mainly, where alot of those other options are locked down. But plenty of people already know to just record their screen from their phone anyway - impossible to block that and much safer way to exfiltrate whatever info/data you need.
From the Article, if only to be pedantic enough that I agree with 'yes a browser might work'
> The company plans to start rolling out this new Teams feature to Android, desktop, iOS, and web users worldwide in July 2025.
OTOH we will see if there's any type of weasel-wording on whether browser is in fact non-supported (i.e. will go to audio-only mode.)
The other possibility, is that every 'supported' platform has some form of DRM that results in the functionality working even on browser (just thinking out loud about DRM functionality possibilities) means Windows/MacOS/Android/iOS all work but everyone else is out of luck.
"Easily" is temporary. There's already zero way to capture protected pixels on iOS. Cabled mirroring, screen casting, airplay, they're all blocked. Messaging apps are capitalizing on this with "screenshot protection for temporary media". Netflix has been doing it for ages. Jailbreak? Detected and blocked as "insecure device"
Maybe you can do it on not-iOS, until your insecure setup will be blocked by the server. Cat and mouse until there's 3 mice in the whole world.
Ran into this “feature” this week. So instead of grabbing a screen cap from my VDI I have to grab it from my primary OS and then email myself the image to cross that corp “boundary”. They recently disabled copy and paste between my computer and the VDI session as well.
That being said - guessing they are doing this for their enterprise customers mainly, where alot of those other options are locked down. But plenty of people already know to just record their screen from their phone anyway - impossible to block that and much safer way to exfiltrate whatever info/data you need.