When using Outlook 2007 in cached mode and a user tries to send a message when they are over the mailbox size limit, the warning that they can't send doesn't come up for 30 or 45 seconds. This is becoming quite frustrating as you can imagine. The user believes the message sent and runs to a meeting or heads home, only to experience the message didn't send due to the restriction.
The Exchange 2007 servers are very robust and not near capacity, I don't suspect performance or network related issues are causing this. I believe it is due to cached mode not talking directly to the server. Any suggestions to prevent this would be helpful.