Hi Roozbeh Zareian,
Thank you for posting in the Microsoft Community Forums.
Check the network connection:
Ensure that your physical device and network connection are stable and that there are no firewall or proxy settings blocking access to Windows 365 services.
Try connecting to Windows 365 using another network or device to troubleshoot network issues.
Check the connection operation status:
Log in to the Microsoft Intune Management Center and navigate to Devices > Windows 365 > All Cloud PCs.
In the Overview > Performance (Preview) list, select a connection and view its status. If the status shows “Unavailable”, see the details on the right.
Troubleshoot using the Troubleshoot this Connection button for more information on connection issues.
Check the status of the cloud computer:
In the Microsoft Intune Management Center, check if the status of the cloud computer is “Running” or “Available”.
If the cloud PC status is abnormal, try restarting the cloud PC or contacting Microsoft support.
Check the physical device configuration:
If you are connecting from a physical device that is configured to boot to the cloud computer, ensure that the physical device is properly configured and has the required software version.
Check that the Windows 365 startup registry entries on the physical device are set up correctly.
Review the error logs:
Collect the error logs on the physical device and the cloud computer for more in-depth analysis.
Logs are usually located in C:\Users{username}\AppData\Local\Temp\DiagOutputDir\Windows365\Logs and C:\Users{username}\AppData\Local\Temp\DiagOutputDir. RdClientAutoTrace and other paths.
Best regards
Neuvi