Exchange2000, Win2000, Outlook 2000. We upgraded from exchange 5.5 to exchange2000 after doing this all our windows boxes that were running outlook 2000 experienced a very noticible lag time when sending messages. ie. you composed a message and then clicked the send button. It takes a good 3-8 seconds where before it was instant. On my machine and 2 others i reinstalled outlook2000 and it fixed the problem. I am wondering if anyone is familiar with this enough to know a way to fix it without uninstalling and installing outlook 15 times. We only have 25 users. We do have a lot of emails but shouldn't be too big to cause a lag. Thanks