Thanks to all the reply and your suggestion. I finally got it working I think. I also found the following article to be extremely helpful for anyone who might have the same issue in the future. http://www.msexchange.org/tutorials/The_Exchange_2000_Server_Instant_Mes saging_Service.html Vince -----Original Message----- From: Vince Tan [mailto:VinceT@xxxxxxxxxxxx]=3D20 Sent: Thursday, June 12, 2003 11:21 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] OT:Exchange IM Sign-in Failed I was wondering if anyone is using exchange IM feature. I am trying it but I kept getting Exchange IM Sign-in Failure. The person logged on to this computer does not have permission to use the specified email address. Please type your email address and password. I used the same username and password to sign in to exchange without problem. And I also made sure that IM is enabled. Vince ******************************************************** This weeks sponsor - Emergent Online 99Point9.com Designed to facilitate efficient resolution of your technical server-based questions, issues and incidents, technical support is a few mouse-clicks away: you submit your incident-specific support requests via our online support helpdesk, our certified engineers resolve them while you monitor the progress, and your systems get back to 99.9% up-time in no time. http://www.99point9.com=3D20 ********************************************************** Useful Thin Client Computing Links are available at: http://thethin.net/links.cfm For Archives, to Unsubscribe, Subscribe or=3D20 set Digest or Vacation mode use the below link: http://thethin.net/citrixlist.cfm ******************************************************** This weeks sponsor - Emergent Online 99Point9.com Designed to facilitate efficient resolution of your technical server-based questions, issues and incidents, technical support is a few mouse-clicks away: you submit your incident-specific support requests via our online support helpdesk, our certified engineers resolve them while you monitor the progress, and your systems get back to 99.9% up-time in no time. http://www.99point9.com=20 ********************************************************** Useful Thin Client Computing Links are available at: http://thethin.net/links.cfm For Archives, to Unsubscribe, Subscribe or=20 set Digest or Vacation mode use the below link: http://thethin.net/citrixlist.cfm ******************************************************** This weeks sponsor - Emergent Online 99Point9.com Designed to facilitate efficient resolution of your technical server-based questions, issues and incidents, technical support is a few mouse-clicks away: you submit your incident-specific support requests via our online support helpdesk, our certified engineers resolve them while you monitor the progress, and your systems get back to 99.9% up-time in no time. http://www.99point9.com ********************************************************** Useful Thin Client Computing Links are available at: http://thethin.net/links.cfm For Archives, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: http://thethin.net/citrixlist.cfm