Update Set-TransportConfig.md

Author: chrisda

exchange/exchange-ps/exchange/Set-TransportConfig.md

@@ -972,11 +972,11 @@ The MessageExpiration parameter specifies the message expiration timeout interva
 
 To specify a value, enter it as a time span: dd.hh:mm:ss where dd = days, hh = hours, mm = minutes, and ss = seconds.
 
-The default value is 1.00:00:00 or 1 days.
+The default value is 1.00:00:00 or 1 day.
 
 A valid value is from 12 hours (0.12:00:00) to 24 hours (1.00:00:00).
 
-Queued messages typically expire after 24 hours, resulting in an NDR for failed delivery. If the value is changed, the NDR will be sent at the new applicable time.
+Queued messages typically expire after 24 hours, resulting in an NDR for failed delivery. If you change this value, the NDR will be sent at the new applicable time.
 
 ```yaml
 Type: EnhancedTimeSpan