Expanding the OS drive of a Virtual Machine in an Azure

I created B1MS standard (cheapest one 🙂 )

With 126 GB of C partition

$vm=Get-AzureRmVM -ResourceGroupName example -name win2016
#stop VM
Stop-AzureRmVM -Name win2016 -ResourceGroupName example -Force
#extend disk to 2TB
$vm.StorageProfile.OsDisk.DiskSizeGB=2048
Update-AzureRmVM -ResourceGroupName example -vm $vm
#start VM
Start-AzureRmVM -ResourceGroupName example -name win2016

We now need to expand partition

$MaxSize = (Get-PartitionSupportedSize -DriveLetter c).sizeMax
Resize-Partition -DriveLetter c -Size $MaxSize

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