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TeamViewer and AnyDesk Cannot Connect to Partner – Complete Fix Guide (2026)

Table of Contents

Hub: Windows 11 Troubleshooting Hub

Quick Answer
TeamViewer and AnyDesk Cannot Connect to Partner errors occur when remote desktop apps fail to establish a connection. To fix it, disable IPv6 on both devices, allow the apps through Windows Firewall, check antivirus settings, restart remote desktop services, update to the latest versions, verify internet connectivity, and flush DNS cache. If the error persists, adjust proxy settings, set correct date/time, or reinstall the application. For more Windows troubleshooting, visit our Windows 11 Troubleshooting Hub.

Why TeamViewer and AnyDesk Cannot Connect to Partner Happens

TeamViewer and AnyDesk Cannot Connect to Partner errors occur when remote desktop applications fail to establish a connection between the local and remote devices. These errors typically manifest as “Unable to connect to partner,” “Partner did not connect to router,” or “Failed to connect to partner.” For official documentation, refer to the TeamViewer connectivity guide and AnyDesk error messages.

When TeamViewer and AnyDesk Cannot Connect to Partner appears, it typically indicates a network configuration issue, IPv6 conflicts, firewall blocking, antivirus interference, or service disruptions[reference:0]. Common triggers include unstable internet connections, incorrect Windows permissions, firewall or proxy blocking, IPv6 conflicts, licensing errors, temporary server maintenance[reference:1], and outdated software versions[reference:2]. For AnyDesk, the error can also occur if the remote device is offline, in sleep mode, or has an incorrect system clock[reference:3].

Before diving into fixes, ensure both devices have a stable internet connection and are powered on. If you are on a corporate network, contact your IT administrator before making changes. For a broader overview of Windows issues, see our Windows 11 Troubleshooting Hub.

⚠️ Warning: TeamViewer and AnyDesk Cannot Connect to Partner can occur if you have been flagged for commercial use. If you are a personal user and receive this flag, you may need to wait or contact support.

1. Disable IPv6 on Both Devices

IPv6 conflicts are one of the most common causes of TeamViewer and AnyDesk Cannot Connect to Partner. Disabling IPv6 on both the local and remote devices often resolves the issue immediately[reference:4].

  1. Press Win + R, type ncpa.cpl, and press Enter[reference:5].
  2. Right-click your active network connection (Ethernet or Wi-Fi) and select Properties[reference:6].
  3. Uncheck Internet Protocol Version 6 (TCP/IPv6)[reference:7].
  4. Click OK to save the changes.
  5. Important: Perform these steps on both the local and remote devices.
  6. After disabling IPv6, restart the remote desktop service and try connecting again[reference:8].

✅ Expected Result: Disabling IPv6 on both devices often resolves TeamViewer and AnyDesk Cannot Connect to Partner immediately. If not, proceed to the next method.

2. Allow Remote Desktop Apps Through Windows Firewall

Windows Firewall can block remote desktop applications, causing TeamViewer and AnyDesk Cannot Connect to Partner. Allowing the apps through the firewall is essential[reference:9].

  1. Open Settings > Privacy & security > Windows Security > Firewall & network protection[reference:10].
  2. Select “Allow an app through firewall”[reference:11].
  3. Click Change settings and locate TeamViewer and AnyDesk in the list[reference:12].
  4. If not listed, click “Allow another app” and browse to the app’s installation folder[reference:13].
  5. Check both Private and Public checkboxes for each app[reference:14].
  6. Click OK and test the connection[reference:15].

💡 Quick Tip: If the issue persists, temporarily disable the firewall to test. If the connection works, the firewall was the issue. Re-enable it and add the apps to the exceptions list.

3. Check Antivirus and Security Software

Third-party antivirus software can interfere with remote desktop connections and cause TeamViewer and AnyDesk Cannot Connect to Partner by blocking or terminating the apps[reference:16].

  1. Open your antivirus application.
  2. Look for options related to firewall, real-time protection, or anti-ransomware.
  3. Add TeamViewer and AnyDesk to the exclusions list or whitelist[reference:17].
  4. If the issue persists, temporarily disable real-time protection to test[reference:18].
  5. Remember: Re-enable your security software immediately after testing[reference:19].

🔁 Alternative Solution: If you are using Bitdefender, note that the VPN adapter can interfere with remote tools. Try disabling the VPN adapter or restarting the system[reference:20].

4. Restart Remote Desktop Services

Corrupted or stuck services can cause TeamViewer and AnyDesk Cannot Connect to Partner. Restarting the services can resolve the issue[reference:21].

  1. Press Win + R, type services.msc, and press Enter[reference:22].
  2. Locate TeamViewer or AnyDesk service.
  3. Right-click and select Restart.
  4. If Restart is unavailable, select Stop, wait a few seconds, then select Start.
  5. Restart your computer and try connecting again[reference:23].

✅ Expected Result: Restarting the services often resolves TeamViewer and AnyDesk Cannot Connect to Partner caused by service glitches.

5. Update TeamViewer and AnyDesk to Latest Versions

Outdated software versions can cause compatibility issues and contribute to TeamViewer and AnyDesk Cannot Connect to Partner. Updating to the latest versions resolves known bugs[reference:24][reference:25].

  1. Open TeamViewer and click Help > Check for new version to update[reference:26].
  2. For AnyDesk, download the latest version from the official website and install it[reference:27].
  3. Important: Update the software on both the local and remote devices.
  4. Restart both devices and test the connection.

💡 Quick Tip: If you are using the Microsoft Store version of TeamViewer, consider uninstalling it and using the desktop version from the official website, as the Store version can have permission issues[reference:28].

6. Check Internet Connection and VPN Settings

Unstable internet connections or VPN misconfigurations can cause TeamViewer and AnyDesk Cannot Connect to Partner. Ensuring network stability is essential[reference:29].

  1. Test your internet speed using a tool like Speedtest[reference:30].
  2. Check for high latency or packet loss:
    ping -t 8.8.8.8
  3. If latency spikes or packets drop frequently, restart your router[reference:31].
  4. If using a VPN, disconnect it and test the connection[reference:32].
  5. Switch to a wired connection for better stability if possible[reference:33].

🔁 Alternative Solution: If the connection works on a mobile hotspot but not on your main network, the issue is likely with your router or ISP configuration[reference:34].

7. Verify Access Permissions on Remote Computer

Insufficient access permissions on the remote computer can cause TeamViewer and AnyDesk Cannot Connect to Partner[reference:35].

  1. On the remote computer, open TeamViewer and click the gear icon to open Options[reference:36].
  2. Go to Advanced, then click Show advanced options[reference:37].
  3. Under “Advanced settings for connections to this computer,” set Access Control to Full Access[reference:38].
  4. For AnyDesk, go to Settings > Security and ensure the access permissions are configured correctly.
  5. Click OK and test the connection.

⚠️ Warning: Granting full access allows complete control of the remote computer. Only do this with trusted partners.

8. Flush DNS Cache and Reset TCP/IP

DNS corruption or TCP/IP stack issues can cause TeamViewer and AnyDesk Cannot Connect to Partner. Resetting these can restore connectivity[reference:39].

  1. Open Command Prompt as Administrator.
  2. Run the following commands in sequence:
    ipconfig /flushdns
netsh winsock reset
netsh int ip reset
  3. Restart your computer.
  4. Test the connection again.

✅ Expected Result: Flushing DNS and resetting TCP/IP often resolves TeamViewer and AnyDesk Cannot Connect to Partner caused by network corruption.

9. Advanced Troubleshooting

If the error persists, try these advanced solutions.

Check Date and Time Settings

Incorrect system clock settings can cause SSL certificate validation failures. Right-click the clock in the taskbar, select Adjust date and time, and ensure “Set time automatically” is enabled[reference:40].

Check Proxy Settings

If you are behind a corporate proxy, configure the proxy settings in the remote desktop app. In TeamViewer, go to Extras > Options > Advanced > Proxy settings. In AnyDesk, go to Settings > Connection.

Disable Direct Connections in AnyDesk

If AnyDesk fails to connect directly, try disabling direct connections. Go to Settings > Connection > General and clear the “Allow direct connections” checkbox[reference:41]. Alternatively, add /np to the AnyDesk ID when connecting[reference:42].

Reinstall the Application

If all else fails, uninstall and reinstall the remote desktop application. For a clean uninstall, use a tool like Revo Uninstaller to remove leftover files and registry entries[reference:43].

Check for Malware

Malware can interfere with remote connections. Run a full scan with Windows Defender Offline. For detailed steps, see How to Scan Malware Windows 11.

Perform a System Restore

If the error started after a system change, use System Restore to revert. See How to Use System Restore Windows 11.

For more Windows troubleshooting, explore our Windows 11 Troubleshooting Hub.

Conclusion

TeamViewer and AnyDesk Cannot Connect to Partner errors are common remote desktop issues that can be fixed by disabling IPv6, allowing the apps through Windows Firewall, checking antivirus settings, restarting services, updating to the latest versions, verifying internet connectivity, and adjusting permissions. If the error persists, flush DNS cache, check proxy settings, or reinstall the application. By following these steps, you can restore remote connectivity.

Regular system maintenance, such as keeping applications updated and periodically checking network settings, can prevent TeamViewer and AnyDesk Cannot Connect to Partner from recurring. For more Windows troubleshooting, explore our Windows 11 Troubleshooting Hub and check out related articles on Windows 11 No Internet Secured Wi-Fi Error, DNS Server Not Responding, and Default Gateway Is Not Available.

Related Guides

FAQ

What causes TeamViewer and AnyDesk Cannot Connect to Partner errors?

TeamViewer and AnyDesk Cannot Connect to Partner errors are caused by IPv6 conflicts, firewall blocking, antivirus interference, unstable internet connections, outdated software, or incorrect permissions on the remote device.

How do I fix TeamViewer and AnyDesk Cannot Connect to Partner?

Disable IPv6 on both devices, allow the apps through Windows Firewall, check antivirus settings, restart services, update to the latest versions, verify internet connectivity, and adjust access permissions.

Does disabling IPv6 fix remote desktop connection errors?

Yes, disabling IPv6 on both the local and remote devices is one of the most effective fixes for TeamViewer and AnyDesk Cannot Connect to Partner errors[reference:44].

Can antivirus cause TeamViewer connection issues?

Yes, antivirus software can block or terminate remote desktop applications. Add TeamViewer and AnyDesk to the exclusions list or whitelist to resolve TeamViewer and AnyDesk Cannot Connect to Partner[reference:45].

How do I allow TeamViewer through Windows Firewall?

Go to Settings > Privacy & security > Windows Security > Firewall & network protection > Allow an app through firewall. Find TeamViewer and check both Private and Public checkboxes[reference:46].

Can outdated software cause remote desktop connection errors?

Yes, outdated versions of TeamViewer and AnyDesk can cause compatibility issues. Update to the latest versions on both devices to fix TeamViewer and AnyDesk Cannot Connect to Partner[reference:47][reference:48].

How do I check if TeamViewer server is down?

Visit the TeamViewer status page or use online tools like DownDetector to check for server outages. If the servers are down, you need to wait until they are restored.

What should I do if the error persists after all fixes?

If the error persists, check date and time settings, configure proxy settings, disable direct connections in AnyDesk, reinstall the application, or perform a System Restore.

Can a VPN cause TeamViewer connection issues?

Yes, VPNs can interfere with remote connections. Disconnect your VPN and test if TeamViewer and AnyDesk Cannot Connect to Partner is resolved[reference:49].

Is TeamViewer and AnyDesk Cannot Connect to Partner a hardware or software issue?

It is primarily a software and network configuration issue. Hardware issues are rarely the cause, though faulty network adapters or routers can contribute.

HowToFixPro Editorial Team

We’re a team of system administrators, technical writers, and platform specialists who genuinely enjoy solving the problems most users find frustrating. From persistent Windows errors and Android sync failures to browser crashes and network drops — we’ve seen it all, and we document every fix properly. Our guides are built on official documentation, direct testing, and real troubleshooting experience. No filler, no guesswork — just reliable, step-by-step solutions you can trust.

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