Update New-TransportRule

Added a fact that "If the rule is created without any condition and exception, that rule will match for all messages."

Such rule has huge impact and often lead to the catastrophic scenario for the customer if not set properly.

Work Item ID: 3103951

Author: m-nestorovic

exchange/exchange-ps/exchange/New-TransportRule.md

@@ -16,6 +16,9 @@ This cmdlet is available in on-premises Exchange and in the cloud-based service.
 
 Use the New-TransportRule cmdlet to create transport rules (mail flow rules) in your organization.
 
+>[!NOTE]
+>If you create a rule without conditions and exceptions, the rule action is applied to all messages. This can have unintended consequences. For example, if the rule action is to delete the message, removing the conditions and exceptions could cause the rule to delete all inbound and outbound messages for the entire organization.
+
 For information about the parameter sets in the Syntax section below, see [Exchange cmdlet syntax](https://learn.microsoft.com/powershell/exchange/exchange-cmdlet-syntax).
 
 ## SYNTAX