RDC The Connection Has Been Lost

When attempting to transfer large files, the connection can be lost. RDC tries to use UDP, but we want to disable UDP. Since UDP is neither stable nor reliable, it causes RDC to lose the connection and attempt to reconnect.

The connection has been lost. Attempting to reconnect to your session... Connection attempt 1 of 5

You can write gpedit.msc in the Run dialog or gpedit in Search.

Edit group policy

When Local Group Policy Editor opens go to Computer Configuration > Administrative Templates > Windows Components

Remote Desktop Services > Remote Desktop Connection Client > Turn Off UDP On Client

Turn Off UDP On Client

You can see Turn Off UDP On Client is Not configured. Select Enabled.

Turn Off UDP On Client Enabled

Click Apply and OK.