Chuck I did this same upgrade many years ago. While we ran the Exchange ADC it's not necessary unless you want to migrate directory information from the Exchange 5.5 database to AD. If you are not worried about that then you really don't need to do it.
Mike Celone Manager of Information Systems Radio Frequency Systems v. 203-630-3311 x1031 f. 203-634-2027 m. 203-537-2406 OnNet: 28971031 mike.cel...@rfsworld.com This message (including any attachments) contains confidential information intended for a specific individual and purpose, and is protected by law. If you are not the intended recipient, you should delete this message. Any disclosure, copying, or distribution of this message, or the taking of any action based on it, is strictly prohibited without the prior consent of its author. -----Original Message----- From: Chuck [mailto:cha...@gmail.com] Sent: Monday, August 16, 2010 1:14 PM To: MS-Exchange Admin Issues Subject: Exchange 5.5 and AD Question I am working for a new client that has a very old set up still using Exchange 5.5 and an NT 4.0 domain. I plan on upgrading the domain this weekend and then in the next month or so moving to Exchange 2003 (for now!) since that seems to be the easiest migration path at this point (apart from creating a new Exchange group and starting from scratch. My question is during the period between upgrading the domain and upgrading Exchange, it is absolutely necessary to install the Active Directory Connector or will I be OK without it for a few weeks until I start the Exchange upgrade process? I realize there are benefits in running it, but is it necessary? I need a little sanity check before I upgrade the domain. Chuck
