It is good to be paranoid. For most people, the change isn't even noticed. For clients that have SAMBA or other downlevel AD clients, you should be prepared for upgrades or for them to stop working. Your backout is to restore to a state prior to the change. All of the DC's would have to be restored to the state prior to the change. Al -----Original Message----- From: gster@xxxxxxxxxxxxx [mailto:gster@xxxxxxxxxxxxx] Sent: Thursday, January 22, 2004 9:42 AM To: [ExchangeList] Subject: [exchangelist] Native mode http://www.MSExchange.org/ Hi All I am about to switch a W2k domain controller with e2k from mixed mode to native mode. We have no NT4 DCs etc, my question is this, has process ever gone wrong for anyone? If for some reason it does go wrong (I realise this is v.unlikely), will the solution be to reinstall the DC and reinstall backup and this will bring me back to the original state. I know that my domain is supposed to be running in native mode but I guess its always better to be a bit paranoid. cheers Graeme ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------