If Azure PowerShell is not installed, please install it from http://azure.microsoft.com/en-us/downloads/ then modify and run the following script:
1) Navigate to the Azure Portal
2) Click on Virtual Networks
3) Select the Vnet you want to check
4) Click on Subnets
Generally when we have an Azure Virtual Machine we think of it as being unavailable in a few different ways:
Symptoms: When attempting to RDP to your virtual machine you receive an error regarding Network Level Authentication (NLA):
1) Create a Recovery VM located in the same Resource Group, Storage Account and Location of the impacted VM.
2) Delete the affected VM via the Azure Portal
3) Open PowerShell ISE as an Administrator
VM is stuck in a “Failed” state
You can attempt to clear this state by updating the VM via PowerShell. This causes no additional downtime and only takes a moment.