We have several users complaining about receiving a message about Outlook not closing properly and then it takes around 5 minutes to scan. We are currently using Outlook 2007 and have our users set to "Cached Exchange Mode". We prefer for our users to stay in "Cached Exchange Mode" instead of online mode. Is there a way we can prevent this "Outlook not closing properly" issue from occurring? It appears to happen to end users that have larger mailboxes.