Getting the below message, when message has been sent to the active user (existing in mail server). This message could not be sent. Try sending the message again later, or contact your network administrator. Your server administrator has limited the number of items you can open simultaneously. Try closing messages you have opened or removing attachments and images from unsent messages you are composing. Error is [0x80040305-0x0004de-0x00054a]. Exchange 2007 server with SP3 Outlook 2010. Does any one knows, why I got this NDR suddenly? ThanksFunnyghost

1. Try to send the email through OWA. if sucessfull then clear the cache in outlook and then send from outlook as well. 2. Like i said above Do your users get this NDR when using OWA as well or only through Outlook? What version of outlook are they running? Have you tried creating new profile for the users? How often does this happen (interval between occurences)? Thanks