I have a problem believe to be with an exchange server 2007. I have some users who for some unknown reasons are at a site who are experiencing slowness with outlook 2007. When they try to open outlook 2007 their machine freezes, those who have it open their machine locks up until they kill the outlook 2007 in the task manager. The weird thing is this is happening intermittantly to different users with no related pattern. One day one user could experience this and another day several users experience the issue. When this is happening once outlook is closed we could access everything else fine. Internet explorer, fileshare, apps that connect to different servers. So I have ruled out everything else but exchange.
I am a newbie to exchange and under perfmon the processor, disk and network are ok. Any hints or answers please.