Hi Wedge2007 - are you talking about clearing the temp internet files on the client, or on the server? If on the client, I'll give it a shot, but I don't think it'll be the fix I'm looking for as we've accessed this mailbox Explorer from at least 3 different machines with the same account.
Viam - The user had moved all his shortcuts previously, which is how I discovered that a folder was missing. I did a Vault search to find out where the shortcuts originally were, (all in one folder) and this is the folder that's not visible in AE. I'm going to try recreating the folder and acrchiving a message to see if maybe it will then show the folder with the all the mails that can't be seen in that folder.
P.S. On the issue of users being users (moving shortcuts etc). Are there any plans to provide a tool that will allow you to align the folder data in Vault with the location that the user has moved their shortcuts to?