Align ForwardPai param to Set- cmdlet

Author: get-itips

skype/skype-ps/skype/New-CsOnlinePSTNGateway.md

@@ -164,7 +164,7 @@ Accept wildcard characters: False
 ```
 
 ### -ForwardPai
-Indicates whether the P-Asserted-Identity (PAI) header will be forwarded along with the call. The PAI header provides a way to verify the identity of the caller. The default value is False ($False).
+Indicates whether the P-Asserted-Identity (PAI) header will be forwarded along with the call. The PAI header provides a way to verify the identity of the caller. The default value is False ($False). Setting this parameter to $true will render the from header anonymous, in accordance of RFC5379 and RFC3325.
 
 ```yaml
 Type: Boolean