#Source VHD
$srcUri="https://yourstorageaccount.blob.core.windows.net/vhds/src_image.vhd"

#Source StorageAccount
$srcStorageAccount="src_storageaccount_name"
$srcStorageKey="src_storage_account_key"

#DestinationStorageAccount
$destStorageAccount="dest_storageaccount"
$destStorageKey="dest_storage_account_key"

#Create the source storageaccount context
$srcContext=New-AzureStorageContext
-StorageAccountName $srcStorageAccount
-StorageAccountKey $srcStorageKey

#Create the destination storageaccount context
$destContext=New-AzureStorageContext
-StorageAccountName $destStorageAccount
-StorageAccountKey $destStorageKey

#Destination ContainerName
$containerName="destinationcontainer"

#Create the  container on the destination
New-AzureStorageContainer -Name $containerName -Context $destContext

#Start the asynchronous copy, specify the source authentication
$copyblob=Start-AzureStorageBlobCopy -srcUri $srcUri -SrcContext $srcContext
-DestContainer $containerName -DestBlob "NewVHD.vhd"
-DestContext $destContext