I have not personally experienced this issue, but there continue to be reports on the tubes of native Outlook 2007 performance issues. In most cases, an upgrade to Office 2007 SP1 and some mail file maintenance will resolve the problem. But if you continue to experience issues, here are some pages that will help you troubleshoot:
- Microsoft KB: How to troubleshoot performance issues in Outlook 2007
- SlipStick: Outlook 2007 is very slow
- Outlook Team Blog: Sync Filters and Performance
I’m particularly fond of the last tip. I advise folks to try and keep their primary mail file small, but if you’re an Exchange User and you want to leave your entire mail file on the server, setting up some sync filters might be just what you need to keep things running smoothly.