Clarify Test-Message cmdlet syntax requirements

Updated syntax for Test-Message cmdlet to require -TransportRules or -UnifiedDlpRules switch.

Author: arindamthokder

exchange/exchange-ps/ExchangePowerShell/Test-Message.md

@@ -23,7 +23,7 @@ For information about the parameter sets in the Syntax section below, see [Excha
 
 ### TransportRules
 ```
-Test-Message -Recipients <ProxyAddressCollection> -SendReportTo <RecipientIdParameter> [-TransportRules]
+Test-Message -Recipients <ProxyAddressCollection> -SendReportTo <RecipientIdParameter> -TransportRules
  [-Confirm]
  [-Force]
  [-MessageFileData <Byte[]>]
@@ -35,14 +35,16 @@ Test-Message -Recipients <ProxyAddressCollection> -SendReportTo <RecipientIdPara
 
 ### UnifiedDLPRules
 ```
-Test-Message -Recipients <ProxyAddressCollection> -SendReportTo <RecipientIdParameter> [-UnifiedDlpRules]
+Test-Message -Recipients <ProxyAddressCollection> -SendReportTo <RecipientIdParameter> -UnifiedDlpRules
  [-Confirm]
  [-Force]
  [-MessageFileData <Byte[]>]
  [-Sender <SmtpAddress>]
  [-WhatIf]
  [<CommonParameters>]
 ```
+> [!NOTE]
+> Test-Message command must be run with either -TransportRules or -UnifiedDlpRules switch.
 
 ## DESCRIPTION
 You need to be assigned permissions before you can run this cmdlet. Although this article lists all parameters for the cmdlet, you might not have access to some parameters if they aren't included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see [Find the permissions required to run any Exchange cmdlet](https://learn.microsoft.com/powershell/exchange/find-exchange-cmdlet-permissions).