What are the common cause in unable to remote desktop to Azure VMs? I already have RDP ports enable as well successfully did a network test.
You can first check if there are IP connectivity to the VM. Try to telent or try any layer 4 connectivity test to your VM's Public IP on port 3389.
If that is closed, then you need to check if you have allowed port 3389 in the Inbound rule of your VM's NSG.
You can also follow this troubleshooting guide: https://docs.microsoft.com/en-us/azure/virtual-machines/troubleshooting/troubleshoot-rdp-connection
If you have changed the default RDP port then run following Power Shell Script.
netsh advfirewall firewall add rule name="Open RDP Port " dir=in action=allow protocol=TCP localport=
maybe DNS issues,please check your dns. or try to use public-ip
Check if your machine that will connect to the Azure VM is allowed for connecting outbound to 3389.
Check if port 3389 is being blocked on the NIC's NSG before checking the NSG on the subnet level.
Try restarting the virtual machine.
Try redelopying the VM to another host.
Check you rdp version on your workstation matches your VM version and that NLA is enabled.
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