We have recently upgraded from an Exchange 2003 environment to an Exchange 2010 environment. We have been running Outlook 2007 through the upgrade. One of our users recently had an issue in which an inbox folder was clicked and displayed no items. Clicking off of the folder and back onto the folder displayed the items. To fix this issue, we ran outlook using the /cleanviews switch which appears to have fixed the folder display problem, but has caused another. The flag status can no longer be toggled via left click. It can be toggled via right click and selecting an option, but the left click sets it to 'complete', even if there was no follow up selected. Clicking the completed check mark flashes the flag for a split second, but the field remains in a 'complete' status. This problem appears to propogate to the server, as logging into a different computer yields the same result. I have recreated this problem using my own account and a new test account has this problem right out of the gate. It seems like an Exchange server problem. Anyone have any similiar problems or know what we might be able to do to fix it?