Following on from my above post, I have completed some more testing and believe I have the issue pinned down to an issue with the upgrade process. 1.8.0.1 fresh installIf I complete a fresh install of osTicket the POP3 mailboxes are correctly polled, mail is collected and tickets are created. 1.6 upgrade to 1.8.0.1If I upgrade 1.6 to 1.8.0.1 the upgrade completes OK, but the POP3 mailboxes are NOT polled, mail is not imported and tickets are not created and the cron log file has "kwaheri rafiki!" in it. This entry is not seen on the fresh install of 1.8.0.1.Testing ActionsI created two virtual machines running Windows 2003 R2 SP2 & all the current MS Updates. 1.8 VM fresh install of 1.8.0.1Installed IISInstalled .net 4.0Installed MySQL 5.5.28Installed PHP 5.3 for Windows Server via WPM with .NET 2.0Added all the new MS UpdatesInstalled osTicketScheduled a cron batch fileEnabled POP pollingCreated 3 test email accounts on the email serverAdded the emails to osTicketChecked the POP3 log on the email server and can see all 3 mailboxes being polled every 5 minsSend test emails and they are created in osTicket1.6. VM with upgrade to 1.8Installed IISInstalled PHP 5.3 (5.3.15) & configured PHP in IISInstalled MySQL 5.5.28Imported the MySQL dumps from the live osTicket serverCopied the osTicket folder from the IIS folder on live osTicket server Scheduled a cron batch fileLogged in to osTicket to test the copy from the live osTicket server to the VM is working OKChecked the POP3 logs and can see all the mailboxes being polledUn-Installed PHP 5.3 (5.3.15) & remove the PHP config in IISInstalled PHP 5.3 for Windows Server via WPM with .NET 2.0Installed all the latest MS UpdatesCopied the new 1.8.0.1 upload folder contents to the osticket folder in IISChanged the path for the cron batch fileLogged into osTicket and completed the upgrade to 1.8.0.1Everything looks OK in osTicket, I can see all the staff, depts, emails, tickets etc.Checked the POP3 logs on the mail server and none of the mail boxes are being polledSent test emails and the emails remain in the mailboxes on the email serverThe cron.log file has "kwaheri rafiki!" insideFurther observationsIf I add the test email accounts created for the 1.8 VM to the 1.6 VM after being upgraded to 1.8.0.1 these mailboxes are NOT polled. However, if I add one of the live email addresses used from the upgraded osTicket in the fresh 1.8 VM install the mailbox is correctly polled and tickets are created, this proves the mailboxes are OK and to me shows there is an issue with upgrading from 1.6 to 1.8.01, because a fresh install of 1.8.0.1 works a treat. Please can a member of the osTicket staff provide some feedback?