Express Cache folder content not deleting The content of the \Express\cache folder is not deleted.

When a user logons onto there mail via the Express web interface a temporary folder is created within \express\cache directory for that session.  When the user logs out this folder will be deleted but under the following the folder might not be deleted immediately: 

• The user simply closes the browser without selecting the "log out" option from Express

In this case the content within the cache folder is deleted once the session timeout limit is reached.  This value can be configured by editing item 13 within the expresscfg.asp file, which can be located within the \express\web directory.  The default value is 20 Minutes, therefore if a user does not log out of Express correctly then the temporary directory will be removed after the 20 minutes.

• The cache folder does not have the correct permissions assigned to it

To solve this problem assign the "everyone" account with full permissions to the "cache" and "temp" directories within the MailSite directory. To be more specific, the NT account under under the Express virtual directory (or website) in IIS that needs at least 'modify' permissions on the directories.