Ok Gurus- We run a NT 4 single domain with a mix of win2k servers. We have a single Exchange 5.5 (enterprise) site running on a win2k server. We would like to upgrade all servers and migrate to AD. In your opinion, should we migrate to 2000 or 2003? Which is a better version of Exchange, 2000 or 2003? If Exchange 2003 is better, will it function fully in a 2000 AD? thanks, Greg CONFIDENTIALITY NOTICE: This E-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized retention, review, printing, copying, disclosure or distribution is prohibited. If you are not one of the intended recipients, please contact the sender by reply e-mail or phone, destroy all copies of the original message and keep the information contained here confidential.