Despite having a good WiFi or Ethernet connection, regardless of which network I'm on, if I join a Microsoft Teams call, all network connectivity stops working and teams simultaneously reports poor call quality and no network connectivity. All this while on an active call which I can see and hear. Here's a full description of symptoms.

Every time I connect to a Teams meeting:

• Incoming call quality is ok. I can hear and see others.


• Outgoing call quality is very poor. Others say my voice is breaking up.


• If I unmute and speak for more than a few seconds, I am booted from the call.


• If I stay muted I can stay on the call indefinitely.
  I can share my screen just fine, I don't get kicked from the call.


• Teams periodically puts up a warning symbol in the call controls reporting poor connectivity.


• Teams puts up a blue banner stating that I have been disconnected from the internet.
  (Intermittent) Teams puts up a big overlay on top of the whole app saying I have been disconnected


• The call continues though all of this, including voice and video.


• All other network connectivity is broken (e.g.: Browsers cannot load pages, network drives stop working)


• Text chat features work fine outside calls but not during calls, where they fail to work like all other network activity)


• The instant the meeting ends, all the symptoms stop. I can access network resources again.

My wifi connection is fine. I've tested using wired networking and encounter the exact same issue. I've also tried various audio devices and disconnecting all peripherals as longshot solutions. No dice. I don't have anything weird on my system as far as I am aware. Teams works fine on other machines but not on my primary laptop.
This issue not only makes Microsoft Teams itself nearly unusable, it knocks my whole system offline for the duration of the call, which is incredibly frustrating.

I'm booting into Windows 10 on a 2015 MacBook Pro 13". I have all the latest patches for everything. Teams Version 1.2.00.26774 (64-bit)

I've tried clearing the %appdata%\Microsoft\teams folder. I found no change to the issues I am having. After joining a meeting I was greeted with a "No internet connectivity" banner and a warning symbol in my call controls panel.

I ran the Skype for Business Network Assessment Tool. It found no issues:

C:\Program Files (x86)\Microsoft Skype for Business Network Assessment Tool>networkassessmenttool.exe /connectivitycheck
Skype for Business - Network Assessment Tool

Starting Connectivity checks
Verifications completed successfully

Web client works fine. No issues with network connectivity. I was able to place a call no problem.

I've seen two other people who have what I think is the same issue as mine, but their question threads didn't have any solutions, and now they're locked.

https://answers.microsoft.com/en-us/msoffice/forum/all/microsoft-teams-always-appears-poor-network/1a9ef89c-e495-4e2c-b108-d5b8702a54a8

https://answers.microsoft.com/en-us/msoffice/forum/all/teams-kills-all-connections/6b9dd383-df31-4bec-957a-41ee478eab3e

Does anyone have any idea what could be going wrong? Any solutions? Any more info needed from me about my setup?

When a conversation is started on a document from a SharePoint document library (not the Files tab), the link created in the conversations tab will not display the document.

If the document is a Microsoft Office file, an error message is returned saying "Sorry, this file has been deleted or moved".

If the file is a PDF, an error message is displayed saying "This item might not exist or is no longer available. This item might have been deleted, expired, or you might not have permission to view it. Contact the owner of this item for more information."

This is clearly a bug, as you can select the "..." menu and then select "Open in SharePoint" and the file will open. Also the link created for documents in the Files tab will open the document in Teams without issue.

I've reported this as a Service Request to Microsoft, however they have been unable to find a solution, and suggest posting here to get the issue escalated with the development team to fix this bug in an update.

I work in the healthcare environment and we recently deployed many iPod touch SHARED devices out in the field to increase department communication. The issue is that if multiple employees have logged into the teams app on an iPod touch and then log out, any employee can tap on another employee email account, if they have logged in previously, and Teams will simply login without prompting for a username or password.

Scenario:
Employee A receives iPod touch in the morning and logs in to Teams
Employee A logs out of Teams on iPod touch at end of shift
Employee B receives iPod touch at start of shift and logs in to Teams
Employee B logs out of Teams on iPod touch at end of shift

Bug:
After Employee A logs out, Employee B can simply tap on Employee A's email account and Teams will login without prompting for username or password. We have tried clearing the cache, deleting the app, etc. but nothing seems to work. This is a major concern. Anyone from the department could potentially use another employees Teams account by accident or purposefully.

It is not possible to upload/attach files to some of our channels anymore (neither through Teams app nor through a browser). This happened after one of our team members accidentally deleted all folders from our sharepoint. Even though we restored the folders, it is not possible to attach files when posting to one of these channels (for example to "General"). Also it is not possible see anything in the "Files" tab anymore. Newly created channels don't have this problem.

There seems to be some permission issue as the POST request to ".../sharepoint/files?..." fails with HTTP 403:

{"errorCode":"Forbidden","message":"Exception encountered from Sharepoint for requestId xyz"}

We could probably delete all channels, except for "General". Is there any way to fix this?