Switching to Exchange native mode

Jan mailed me:  she had her finger on the button, about to make the switch from mixed mode to native mode, and wanted a sanity check before actually hitting the option button.  AD was also running in mixed mode.  So what to switch first?  Exchange or AD?  They had already decomissioned the 5.5 boxes so there was no problem with not being able to comunicate with them if things go wrong once the switch was made to native. Her concern was that they may not be aware of any potential problems  once they made the change, with regard to the fact that AD is still running in mixed mode. So should she go AD native first? or isn’t it relevant?

Well there is a nice checklist here to help you decide whether you’re ready to make the switch to Exchange native mode in the first place.  And if you’re running Windows 2003 server throughout on your Domain Controllers, then you can raise the domain functional level to Winbdows Server 2003, and then switch to native mode.  (see Rodneys article here for more information).  So I’d do AD first, then Exchange…

ALso check out this list of guides to get you over any common mistakes that may occur… If you’ve checked everythihg out well, then you’ll have no problems with it…