Update Set-ExternalInOutlook.md

chrisda · chrisda · commit f3eade97ff8b · 2021-08-18T13:17:31.000-07:00
Issue #8206
diff --git a/exchange/exchange-ps/exchange/Set-ExternalInOutlook.md b/exchange/exchange-ps/exchange/Set-ExternalInOutlook.md
@@ -76,7 +76,9 @@ Accept wildcard characters: False
 ```
 
 ### -AllowList
-The AllowList parameter specifies exceptions to external sender identification in supported versions of Outlook. Messages received from the specified senders or senders in the specified domains don't receive native External sender identification. Valid values are an individual domain (contoso.com), a domain and all subdomains (*.contoso.com) or email addresses (admin@contoso.com).
+The AllowList parameter specifies exceptions to external sender identification in supported versions of Outlook. Messages received from the specified senders or senders in the specified domains don't receive native External sender identification. The allow list uses the `5322.From` address (also known as the **From** address or P2 sender).
+
+Valid values are an individual domain (contoso.com), a domain and all subdomains (*.contoso.com) or email addresses (admin@contoso.com).
 
 To enter multiple values and overwrite any existing entries, use the following syntax: `Value1,Value2,...ValueN`. If the values contain spaces or otherwise require quotation marks, use the following syntax: `"Value1","Value2",..."ValueN"`.
 

-Original file line number
+Diff line change
 ```
 ### -AllowList
 -The AllowList parameter specifies exceptions to external sender identification in supported versions of Outlook. Messages received from the specified senders or senders in the specified domains don't receive native External sender identification. Valid values are an individual domain (contoso.com), a domain and all subdomains (*.contoso.com) or email addresses ([email protected]).
 +The AllowList parameter specifies exceptions to external sender identification in supported versions of Outlook. Messages received from the specified senders or senders in the specified domains don't receive native External sender identification. The allow list uses the `5322.From` address (also known as the **From** address or P2 sender).
++
 +Valid values are an individual domain (contoso.com), a domain and all subdomains (*.contoso.com) or email addresses ([email protected]).
 To enter multiple values and overwrite any existing entries, use the following syntax: `Value1,Value2,...ValueN`. If the values contain spaces or otherwise require quotation marks, use the following syntax: `"Value1","Value2",..."ValueN"`.