Added details about multiple attachments

Author: chrisda

exchange/exchange-ps/exchange/antispam-antimalware/New-MalwareFilterPolicy.md

@@ -91,9 +91,9 @@ The Action parameter specifies the action to take when malware is detected in a
 
 - DeleteMessage: Handles the message without notifying the recipients. This is the default value. In Exchange Server, the message is deleted. In the cloud-based service, the message is quarantined.
 
-- DeleteAttachmentAndUseDefaultAlert: Delivers the message, but replaces the malware attachment with a file named Malware Alert Text.txt that contains the default alert text. In the cloud-based service, the message with the original attachment is also quarantined.
+- DeleteAttachmentAndUseDefaultAlert: Delivers the message, but replaces all attachments with a file named Malware Alert Text.txt that contains the default alert text. In the cloud-based service, the message with the original attachments is also quarantined.
 
-- DeleteAttachmentAndUseCustomAlert: Delivers the message, but replaces the malware attachment with a file named Malware Alert Text.txt that contains the custom alert text specified by the CustomAlertText parameter. In the cloud-based service, the message with the original attachment is also quarantined.
+- DeleteAttachmentAndUseCustomAlert: Delivers the message, but replaces all attachments with a file named Malware Alert Text.txt that contains the custom alert text specified by the CustomAlertText parameter. In the cloud-based service, the message with the original attachments is also quarantined.
 
 ```yaml
 Type: MalwareFilteringAction

exchange/exchange-ps/exchange/antispam-antimalware/Set-MalwareFilterPolicy.md

@@ -119,9 +119,9 @@ The Action parameter specifies the action to take when malware is detected in a
 
 - DeleteMessage: Handles the message without notifying the recipients. This is the default value. In Exchange Server, the message is deleted. In the cloud-based service, the message is quarantined.
 
-- DeleteAttachmentAndUseDefaultAlert: Delivers the message, but replaces the malware attachment with a file named Malware Alert Text.txt that contains the default alert text. In the cloud-based service, the message with the original attachment is also quarantined.
+- DeleteAttachmentAndUseDefaultAlert: Delivers the message, but replaces all attachments with a file named Malware Alert Text.txt that contains the default alert text. In the cloud-based service, the message with the original attachments is also quarantined.
 
-- DeleteAttachmentAndUseCustomAlert: Delivers the message, but replaces the malware attachment with a file named Malware Alert Text.txt that contains the custom alert text specified by the CustomAlertText parameter. In the cloud-based service, the message with the original attachment is also quarantined.
+- DeleteAttachmentAndUseCustomAlert: Delivers the message, but replaces all attachments with a file named Malware Alert Text.txt that contains the custom alert text specified by the CustomAlertText parameter. In the cloud-based service, the message with the original attachments is also quarantined.
 
 ```yaml
 Type: MalwareFilteringAction