HI all, We are upgrading from Exchange 2003 to Exchange 2010. A requirement is that the Exchange server be in native mode. It is currently in mixed mode. Some of our users use Outlook 2003 and Outlook anywhere. Will changing it from mixed to native mode break this functionality or any other functionality? Any help,suggestions or ideas highly appreciated.

No, it won't break anything, Outlook 2003 works with Exchange 2010. But recommended versions are 2007 and 2007. Exchange 2007 and 2010 can't be installed in Mixed Mode hence you need to change it to Native Mode. Cheers, Gulab | MCTS-MCITP Messaging: 2010 | MCTS-MCITP Messaging: 2007 | MCC 2011 | Skype: Gulab.Mallah

Thank You