Update Set-TransportConfig.md

Updated public doc on -PreventDuplicateJournalingEnabled

Author: MithunRathinam

exchange/exchange-ps/exchange/Set-TransportConfig.md

@@ -62,6 +62,7 @@ Set-TransportConfig [[-Identity] <OrganizationIdParameter>]
  [-MaxRetriesForRemoteSiteShadow <Int32>]
  [-MaxSendSize <Unlimited>]
  [-MessageExpiration <EnhancedTimeSpan>]
+ [-PreventDuplicateJournalingEnabled <Boolean>]
  [-QueueDiagnosticsAggregationInterval <EnhancedTimeSpan>]
  [-RejectMessageOnShadowFailure <Boolean>]
  [-ReplyAllStormBlockDurationHours <Int32>]
@@ -984,6 +985,25 @@ Parameter Sets: (All)
 Aliases:
 Applicable: Exchange Online
 
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+### -PreventDuplicateJournalingEnabled
+This parameter is available only in the cloud-based service.
+
+The PreventDuplicateJournalingEnabled parameter is designed to prevent duplicate journaling reports that can occur when messages are processed by both on-premises and cloud journaling agents. By enabling this setting, you can ensure that journaling messages are not duplicated. 
+
+Valid input for this parameter is $true or $false. The default value is $false.
+
+```yaml
+Type: Boolean
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online
+
 Required: False
 Position: Named
 Default value: None