We are running Exchange 2003 SP2 and our clients have Office 2010. Our Outlook profiles are created automatically by using Group Policy to set a registry key which points to a PRF file with all the Outlook settings. Lately, many of our users are reporting that their emails are getting stuck in the Outbox. If you look at their Outlook profile, they have two Exchange accounts listed. You cannot delete either of them; it gives a message that this is the default email account.
The immediate solution is to recreate the user's Outlook profile. This allows the stuck email to send. The real issue is that this keeps occurring. Recreating the Outlook profile sometimes fixes the problem for a long time, months maybe. But other times the problem occurs the next day. This is happening with users who have established Outlook profiles as well as new users logging into their PCs for the first time. I've attached the code from our PRF. Any help is appreciated, as we have around 400 active users and we're constantly chasing after this issue.