[Fix] Microsoft Teams No Network Connection Please check your network settings and try again. [2603]


Microsoft Teams Network Connection error 2603

Recently ran into Connection Error 2603 on Microsoft Teams and it turned out to be a Network issue.

Steps to fix Teams 2603 Connection Error:

  • Make sure that you have an active internet connection (check your WiFi, Ethernet connection)
  • It may be that you are on wifi and you see the full signal, but there is no internet connectivity, try accessing the web or any other application to see if they are working.
  • If you have internet, check the firewall setting.
  • If on Windows, make sure you have the latest version of Windows OS installed (check for updates if on Windows 7, also make sure your Edge browser is up to date)

A note from : https://docs.microsoft.com/en-us/microsoftteams/hardware-requirements-for-the-teams-app,

.NET version: Requires .NET 4.5 CLR or later

Operating system: Windows 11, Windows 10 (excluding Windows 10 LTSC), Windows 10 on ARM, Windows 8.1, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2. Note: We recommend using the latest Windows version and security patches available.

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