Update Get-MailTrafficATPReport.md

Author: chrisda

exchange/exchange-ps/exchange/Get-MailTrafficATPReport.md

@@ -218,7 +218,7 @@ Content malware EventTypes:
 
 - AvDocumentMalware (Indicates malware found by the anti-malware engine. Reporting requires ATP/E5.)
 
-\* These features require a standalone Office 365 ATP or E5 subscription.
+\* These features require an E5 subscription or an Office 365 ATP add-on.
 
 To enter multiple values, use the following syntax: \<value1\>,\<value2\>,...\<valueX\>. If the values contain spaces or otherwise require quotation marks, use the following syntax: "\<value1\>","\<value2\>",..."\<valueX\>".