We have recently changed telecom providers. Since then, most of our users get the above-mentionned Outlook error message. Outlook reconnects immediately, but the performance is significantly affected. These problems did not occur before the telecom switch.
The Exchange server is a virtualised server which runs out of our colocation facility. It uses Exchange 2000 and our clients use Outlook 2003. We have installed Outlook 2003 on another virtual server at the same physical location and running on the same blade server to test whether this client would experience the same problems and it has not.
From our remote location, we have pinged the exchange server and got no packet loss. Other network tasks such as printing and moving files work without problem.
I reviewed posts on expert-exchange relating to my problem but could not find any that dealt with a change in telecom provider or equipment.
Does anyone have an idea where to look?