Intermittent disconnects in Microsoft Teams sessions!!

Carter Alyssa 0 Reputation points
2026-08-27T16:57:13.9433333+00:00

Dear Support Team,

We're experiencing intermittent disconnects in the Microsoft Teams app on some teams in our organization. During sessions, users report that the application disconnects unexpectedly, affecting the continuity of meetings and real-time communication.

Incident Details:

  • App: Microsoft Teams (desktop version).
  • Behavior: Frequent disconnections during active meetings or sessions.
  • Scope: The issue affects only a few computers/network loops.
  • Frequency: Intermittent, with no specific pattern identified.
  • Location: [Indicate site(s) or branch(es)].
  • Network: [ / WIFI network].
  • Actions carried out:
    • Verification of Internet connectivity.
      • Updating the app to the latest version available, as well as internet patches.
        • Restarting computers and reinstalling the application.
          • Validation of firewall and proxy policies.
            • Testing on different networks.

We would appreciate your support in identifying the root cause of the problem. We also ask for your guidance on potential additional revisions, such as analysis of latency, packet loss, or specific configurations required to optimize the operation of Teams.

We remain attentive to your comments and any additional information you require.

Microsoft Teams | Microsoft Teams for business | Other
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  1. AI answer

    2026-08-27T16:57:32.14+00:00

    For intermittent Teams desktop disconnects that affect only some computers or network segments, the most likely causes in the provided guidance are network instability, unsupported audio devices, or environment-specific network configuration issues.

    Recommended next checks:

    1. Confirm whether the disconnect is a full network drop or only the Teams session drops.
      • If internet access remains available while Teams disconnects, focus on Teams media/network path issues.
      • If the whole connection drops, focus on the local wired/Wi-Fi path, dock, adapter, cable, or site network.
    2. Check connection quality on the affected network loops.
      • Microsoft guidance identifies dropped calls and meeting disconnects as likely due to network issues.
      • Verify stable internet connectivity and adequate throughput for both sides of the call.
      • Review latency, packet loss, and jitter on the affected segments, especially during meetings.
    3. Validate network infrastructure behavior for Microsoft 365 traffic.
      • Check whether firewalls, proxies, or other network devices are blocking or degrading HTTPS or WebSocket connectivity to Microsoft 365 domains.
      • If TLS inspection/decryption is enabled, review whether Microsoft 365 traffic is being intercepted, because this can affect service connectivity.
    4. If VPN is in use, test without it.
      • Microsoft provides admin guidance for VPN split tunneling for Microsoft 365 and Teams.
    5. Check endpoint-specific hardware on affected devices.
      • If the issue is limited to certain computers, test with a different network adapter, dock, Ethernet cable, or a direct connection instead of the dock.
      • Update dock firmware and network adapter drivers where applicable.
    6. Verify Teams-certified audio devices.
      • Call drops can occur with non-certified devices, including scenarios such as clicking a call notification or resuming from hold.
    7. Restart Teams and confirm the latest Teams version.
      • This is recommended for temporary client-side issues.
    8. Check for service-side incidents.
      • Review Microsoft 365 Service Status to rule out an active service incident.
    9. Collect logs from an affected device if the issue continues.
      • For calls and meetings, Teams diagnostic logs can be collected with Ctrl + Alt + Shift + 1.
      • In Azure Virtual Desktop environments, logs are written on the host VM to %userprofile%\Downloads\MSTeams Diagnostics Log DATE_TIME.txt and desktop app logs can also be reviewed under %appdata%\Microsoft\Teams\logs.txt.
    10. Escalate through the Microsoft 365 admin center if needed.
    • If the issue persists after the network and device checks, the Microsoft 365 administrator should contact Microsoft Teams support from the Microsoft 365 admin center for deeper diagnostics.

    For network administrators, the most relevant areas to review are:

    • VPN split tunneling for Microsoft 365/Teams
    • Firewall, proxy, and antivirus handling of Microsoft 365 traffic
    • Teams network preparation guidance
    • QoS configuration for Teams media traffic

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Jay1 Tran 605 Reputation points Independent Advisor
    2026-08-27T17:47:20.45+00:00

    Hi Carter,

    Thank you for reaching out.

    Since the issue affects only a few computers or network loops and is intermittent, this often points to a local network, endpoint configuration, or VPN-related issue rather than a global Teams service problem.

    To help isolate the root cause, please follow the steps below:

    1. Ask your IT administrator to check meeting metrics in the Teams admin center
    • Sign in to the Microsoft Teams admin center.
    • Go to Users > Manage users, select an affected user, and then open the Meetings & calls tab.
    • Review recent meeting quality and connection metrics, including latency, jitter, and packet loss.
    1. Ask your IT administrator to verify the network configuration for your organization
    • Confirm that required Teams endpoints, ports, and protocols are allowed through your firewall and proxy.
    • Ensure UDP ports 3478-3481 are open for media traffic.
    • Check that your network is not performing SSL/TLS inspection on Teams traffic, which can cause disconnections.
    • If VPN is used, verify whether split tunneling is enabled for Microsoft 365 and Teams traffic. Without split tunneling, Teams media may be routed through the VPN and cause instability.
    1. Try Teams on the web
    • Please ask the affected users to access Teams through https://teams.microsoft.com using a supported browser.
    • Test whether the same disconnections occur in a meeting on the web version.
    • This helps determine if the issue is specific to the desktop client or related to the network/endpoint.
    1. Temporarily disable VPN and test again

    If the affected users are connected through a VPN, please have them temporarily disconnect or bypass the VPN.

    • Then join a Teams meeting and monitor whether the disconnections continue.
    • If the issue stops while the VPN is off, the problem is likely related to VPN routing or performance. Your IT administrator should review VPN configuration, including split tunneling and bandwidth allocation.

    I hope this information is helpful. Please follow the steps above and let me know if it works for you. If not, we can continue working together to resolve the issue.  

    Thank you for your patience and understanding. I look forward to continuing the conversation.  

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