Remove a tag (AzureRM)

removetag.ps1

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# Remove a tag
$tagToRemove = "SupportContact"
Write-Host [Start] Tag utilisation: $tagToRemove 
Get-AzureRmTag -Name $tagToRemove

## Remove from resources
$resources = Find-AzureRmResource -Tag @{$tagToRemove=$null}
foreach($resource in $resources)
{
    $resourceTags = (Get-AzureRmResource -ResourceId $resource.ResourceId).Tags
    $resourceTags.Remove($tagToRemove)
    Set-AzureRmResource -Tag $resourceTags -ResourceId $resource.ResourceId -Force
}

## Remove from resource groups
$groups = Find-AzureRmResourceGroup -Tag @{$tagToRemove=$null}
foreach($group in $groups)
{
    $groupTags = (Get-AzureRmResourceGroup -ResourceId $group.ResourceId).Tags
    if($groupTags -ne $null -and $groupTags.ContainsKey($tagToRemove))
    {
        $groupTags.Remove($tagToRemove)
        Set-AzureRmResourceGroup -Tag $groupTags -ResourceId $group.ResourceId 
    }
}
Write-Host [Done] Tag utilisation: $tagToRemove 
Get-AzureRmTag -Name $tagToRemove
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