Hashtable not being read as hashtable in Azure Automation - powershell

Question

We have a piece of code which works perfectly in Powershell ISE, however when we use the same code in Azure automation, it clears the tags.
$rgs = Get-AzureRmResourceGroup | Where-Object {$_.ResourceGroupName -like "*$rg*"}
foreach ($rg in $rgs)
{
$vms = Get-AzureRmVm -ResourceGroupName $rg.ResourceGroupName
$vms.ForEach({
$tags = $vm.Tags
$tags['ShutdownSchedule_AllowStop'] = "$False";
Set-AzureRmResource -ResourceId $_.Id -Tag $tags -Force -Verbose
})
}
What I've managed to establish so far is that the code Set-AzureRmResource -ResourceId $_.Id -Tag $tags -Force -Verbose does not see $tags as a hastable. I've done some debugging and I can see $tags = $vm.Tags is a hashtable.
I looked around on google and I've seen a few mentions of using [system.collections.hashtable] to specify it is a hashtable, but this is where my powershell is limited. I was hoping someone could point me in the right direction.
I've tried doingResourceId $_.Id -Tag [system.collections.hashtable]$tags but that didn't work.
What we are trying to do is change a tag value from true to false. The Key is Shutdown_AllowStop and the value is currently set to True.
Thanks in advance (and really hoping this makes sense) :)

Answer 1

The following script works for me.
$rgs = Get-AzureRmResourceGroup | Where-Object {$_.ResourceGroupName -like *$rg*"}
foreach ($rg in $rgs)
{
$vms = Get-AzureRmVm -ResourceGroupName $rg.ResourceGroupName
foreach ($vm in $vms)
{
$tags = $vm.Tags
foreach ($tag in $tags)
{
$tag['ShutdownSchedule_AllowStop'] = "$True";
Write-Output ("Showing VM's resource ID " + $vm.ID)
Write-output ("Show VM's tag "+[System.Collections.Hashtable]::new($tag))
$hash = [System.Collections.Hashtable]::new($tag)
$hash['ShutdownSchedule_AllowStop']
Set-AzureRmResource -ResourceId $vm.ID -Tag $hash -ApiVersion "2017-12-01" -Force -Verbose
}
}
}
But you need update Azure Power Shell version in Automation Account, if you don't do this, the script does not work.
This is my test result.

Answer 2

I think I see the issue. It works in the ISE because you defined $vm somewhere earlier in the session. Change it to $tags = $_.Tags and this should work for you.
Edit: So I took a look and the Get-AzureRmVm cmdlet returns an object where the Tags property is a horrid type when what they want in return is a hashtable. What it returns is:
[System.Collections.Generic.Dictionary`2[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]]
Or Dictionary`2 for short if you run a .GetType() on it. What you can do to get around this is to explicitly declare your type when you define it:
[hashtable]$tags = $_.Tags