I work in a GW5.5 environment and I had Outlook 2k working just fine. I upgraded my PC to Windows XP and Outlook XP. I didn't have to re-install the Groupwise plug-in for Outlook. I can receive email, I cannot send it. I attempt to add the Groupwise Address Book to Outlook XP, but it doesn't notice it which, means I cannot send email. Can anyone assist me?