diff --git a/AzSentinel/Classes/ScheduledAlertProp.ps1 b/AzSentinel/Classes/ScheduledAlertProp.ps1
index c5f4176..c9af247 100644
--- a/AzSentinel/Classes/ScheduledAlertProp.ps1
+++ b/AzSentinel/Classes/ScheduledAlertProp.ps1
@@ -92,10 +92,12 @@ class ScheduledAlertProp {
         }
         $this.SuppressionEnabled = if ($suppressionEnabled) { $suppressionEnabled } else { $false }
         $this.Tactics = $Tactics
-        $this.PlaybookName = if ($PlaybookName.Split('/').count -gt 1){
-            $PlaybookName.Split('/')[-1]
-        } else {
-            $PlaybookName
+        if ($PlaybookName) {
+            $this.PlaybookName = if ($PlaybookName.Split('/').count -gt 1){
+                $PlaybookName.Split('/')[-1]
+            } else {
+                $PlaybookName
+            }
         }
         $this.IncidentConfiguration = $IncidentConfiguration
         $this.eventGroupingSettings = @{
diff --git a/AzSentinel/Public/New-AzSentinelAlertRule.ps1 b/AzSentinel/Public/New-AzSentinelAlertRule.ps1
index ddccbaa..2722514 100644
--- a/AzSentinel/Public/New-AzSentinelAlertRule.ps1
+++ b/AzSentinel/Public/New-AzSentinelAlertRule.ps1
@@ -126,7 +126,7 @@ function New-AzSentinelAlertRule {
         [string[]]$Tactics,
 
         [Parameter(Mandatory = $false)]
-        [string[]]$PlaybookName = $null,
+        [string[]]$PlaybookName = '',
 
         [Parameter(Mandatory = $false)]
         [bool]$CreateIncident,
@@ -195,7 +195,7 @@ function New-AzSentinelAlertRule {
             Write-Error $_.Exception.Message
             break
         }
-        
+
         if ($content) {
             Write-Verbose -Message "Rule $($DisplayName) exists in Azure Sentinel"
 
@@ -271,12 +271,12 @@ function New-AzSentinelAlertRule {
 
                     if (($compareResult | Where-Object PropertyName -eq "playbookName").DiffValue) {
                         foreach ($playbook in ($body.Properties.PlaybookName)) {
-                            New-AzSentinelAlertRuleAction @arguments -PlayBookName $playbook -RuleId $($body.Properties.Name) -confirm:$false
+                            $PlaybookResult = New-AzSentinelAlertRuleAction @arguments -PlayBookName $playbook -RuleId $($body.Properties.Name) -confirm:$false
                             $body.Properties | Add-Member -NotePropertyName PlaybookStatus -NotePropertyValue $PlaybookResult -Force
                         }
                     }
                     elseif (($compareResult | Where-Object PropertyName -eq "playbookName").RefValue) {
-                        Remove-AzSentinelAlertRuleAction @arguments -RuleId $($body.Name) -Confirm:$false
+                        $PlaybookResult = Remove-AzSentinelAlertRuleAction @arguments -RuleId $($body.Name) -Confirm:$false
                         $body.Properties | Add-Member -NotePropertyName PlaybookStatus -NotePropertyValue $PlaybookResult -Force
                     }
                     else {