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 call: 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 (but not during calls, where they fail to work like all other network activity) The instant the call 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. I've seen two other people here who have what I think is the same issue as mine, but their question threads didn't have any solutions either, 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?

Same issue here guys. Brand new Lenovo T490, fully patched and fully updating.

Update - I still have the issue, but have made some changes which, unfortunately, didn't have any effect (positive/negative). Upgraded to Win 10 2004 Tried another dock of the same model - made sure to update its firmware. Tried another USB-C / Thunderbolt 3 cable - this is not the split-type cable that shipped with one of these docks, but a straight, simple USB-C Thunderbolt 3 cable which shipped with another one of these docks (dock is the same model #, same revision, etc.). Figured out what the latest version of the Teams desktop app. is (as far as I can tell), and manually installed it. Now running on Teams v1.3.00.14853. No difference. Changed the interface metric of various adapters so Ethernet is prioritized over WiFi. At this point, I think it's a driver issue or an issue with Teams (like something that might be present even in the version I'm now running).. Maybe it's an underlying configuration problem with the driver (e.g., 'Green Ethernet', as has been mentioned), or something else.. I'm not sure. I've been running on the built-in Ethernet port on the T490 for roughly a day and, once again, I have no issues.

Well I'm glad I found this thread because I thought I was going crazy Dell XPS 13 9300 with CableMatters brand USB-C Dock which has a Gigabit Realtek NIC. After 15-20 mins on a call, the network will drop. I can't disable and re-enable the NIC, I must unplug and re-plug it in I thought it was a NIC issue, but I can run iperf with no problems for 3+ hours, not a single dropped packet I am on Win 10 2004, Cisco AnyConnect is installed but not connected

Piling on... same issue. Lenovo T480s, ethernet connection which will drop 10-15 minutes into a call. I've noticed that it happens more when I'm presenting, usually not when I'm in the audience. It's puzzling why that would be the case but it's a clear pattern for me. The laptop switches to WiFi but I can't reconnect on WiFi at that point, I need a reboot. For next time I'll try starting the call on WiFi from the get-go to see if that allows me to get through my full presentation without issues.

Having the same exact issue as others have stated. Within 3-7 minutes of a Team meeting, others in the meeting will see that I have "frozen" and then about 40 seconds later my Ethernet connection will drop out completely. To regain connectivity and re-join the meeting, I simply unplug the network cable and plug it back in. After the initial loss of connectivity, it doesn't happen again a second time after re-connecting to the meeting. I am using a Lenovo Yoga C740-15IML i7 Windows 10 Enterprise. The dock is a Lenovo Thinkpad Thunderbolt 3 Gen 2 Dock Model DK1841. I have an open ticket with Team's support but they have not been able to figure it out it. It appears to be an issue with the specific driver/hardware used in certain models of docks. The DK1841 uses a Realtek chipset and I suspect there is some sort of incompatibility with the current driver or configuration in the Teams Desktop app. As a workaround, I have found this issue does not happen in the following situations: Using a USB-C to Ethernet Adapter connected directly to laptop Connecting via Wi-Fi Using the Teams web / browser version Hopefully this can be sorted out soon...

Microsoft Teams Kills all Network Connectivity During Calls

Anonymous

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 call:

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 (but not during calls, where they fail to work like all other network activity)

The instant the call 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. I've seen two other people here who have what I think is the same issue as mine, but their question threads didn't have any solutions either, 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?

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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133 answers

Anonymous

2020-06-02T16:38:57+00:00

Same issue here guys.

Brand new Lenovo T490, fully patched and fully updating.
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Anonymous

2020-06-02T16:52:59+00:00
Update - I still have the issue, but have made some changes which, unfortunately, didn't have any effect (positive/negative).
1. Upgraded to Win 10 2004
2. Tried another dock of the same model - made sure to update its firmware.
3. Tried another USB-C / Thunderbolt 3 cable - this is not the split-type cable that shipped with one of these docks, but a straight, simple USB-C Thunderbolt 3 cable which shipped with another one of these docks (dock is the same model #, same revision, etc.).
4. Figured out what the latest version of the Teams desktop app. is (as far as I can tell), and manually installed it. Now running on Teams v1.3.00.14853. No difference.
5. Changed the interface metric of various adapters so Ethernet is prioritized over WiFi.
At this point, I think it's a driver issue or an issue with Teams (like something that might be present even in the version I'm now running).. Maybe it's an underlying configuration problem with the driver (e.g., 'Green Ethernet', as has been mentioned), or something else.. I'm not sure.

I've been running on the built-in Ethernet port on the T490 for roughly a day and, once again, I have no issues.
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Anonymous

2020-06-02T22:21:34+00:00

Well I'm glad I found this thread because I thought I was going crazy

Dell XPS 13 9300 with CableMatters brand USB-C Dock which has a Gigabit Realtek NIC. After 15-20 mins on a call, the network will drop. I can't disable and re-enable the NIC, I must unplug and re-plug it in

I thought it was a NIC issue, but I can run iperf with no problems for 3+ hours, not a single dropped packet

I am on Win 10 2004, Cisco AnyConnect is installed but not connected
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Anonymous

2020-06-03T16:35:34+00:00

Piling on... same issue. Lenovo T480s, ethernet connection which will drop 10-15 minutes into a call. I've noticed that it happens more when I'm presenting, usually not when I'm in the audience. It's puzzling why that would be the case but it's a clear pattern for me.

The laptop switches to WiFi but I can't reconnect on WiFi at that point, I need a reboot. For next time I'll try starting the call on WiFi from the get-go to see if that allows me to get through my full presentation without issues.
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Anonymous

2020-06-05T19:52:21+00:00
Having the same exact issue as others have stated. Within 3-7 minutes of a Team meeting, others in the meeting will see that I have "frozen" and then about 40 seconds later my Ethernet connection will drop out completely. To regain connectivity and re-join the meeting, I simply unplug the network cable and plug it back in. After the initial loss of connectivity, it doesn't happen again a second time after re-connecting to the meeting. I am using a Lenovo Yoga C740-15IML i7 Windows 10 Enterprise. The dock is a Lenovo Thinkpad Thunderbolt 3 Gen 2 Dock Model DK1841. I have an open ticket with Team's support but they have not been able to figure it out it. It appears to be an issue with the specific driver/hardware used in certain models of docks. The DK1841 uses a Realtek chipset and I suspect there is some sort of incompatibility with the current driver or configuration in the Teams Desktop app.

As a workaround, I have found this issue does not happen in the following situations:
1. Using a USB-C to Ethernet Adapter connected directly to laptop
2. Connecting via Wi-Fi
3. Using the Teams web / browser version
Hopefully this can be sorted out soon...
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1 person found this answer helpful.

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