I have 2 users on Windows XP with GroupWise 8.0.2 clients that proxy into an engineers mailbox whom also is running Windows XP with GroupWise 8.0.2 client, to process and save his emails to the appropriate locations. After a short while the users machines will slow down and eventually hang until they end task on GroupWise and Notify on their machines. What could cause this?

I should add that the users are not accessing the engineers mailbox at the same time and they are not using that same Windows XP workstation.

Just wondering,