copy-snapshot-to-same-or-different-subscription.ps1

#Provide the subscription Id of the subscription where snapshot exists
$sourceSubscriptionId='dd80b94e-0463-4a65-8d04-c94f403879dc'

#Provide the name of your resource group where snapshot exists
$sourceResourceGroupName='myResourceGroupName'

#Provide the name of the snapshot
$snapshotName='mySnapshotName'

#Set the context to the subscription Id where snapshot exists
Select-AzureRmSubscription -SubscriptionId $sourceSubscriptionId

#Get the source snapshot
$snapshot= Get-AzureRmSnapshot -ResourceGroupName $sourceResourceGroupName -Name $snapshotName

#Provide the subscription Id of the subscription where snapshot will be copied to
#If snapshot is copied to the same subscription then you can skip this step
$targetSubscriptionId='6492b1f7-f219-446b-b509-314e17e1efb0'

#Name of the resource group where snapshot will be copied to
$targetResourceGroupName='myTargetResourceGroupName'

#Set the context to the subscription Id where snapshot will be copied to
#If snapshot is copied to the same subscription then you can skip this step
Select-AzureRmSubscription -SubscriptionId $targetSubscriptionId

$snapshotConfig = New-AzureRmSnapshotConfig -SourceResourceId $snapshot.Id -Location $snapshot.Location -CreateOption Copy 

#Create a new snapshot in the target subscription and resource group
New-AzureRmSnapshot -Snapshot $snapshotConfig -SnapshotName $snapshotName -ResourceGroupName $targetResourceGroupName