Do the passive nodes of an Exchange 2003 and Exchange 2007 require an Exchange license?

Yes, they are running Exchange as well, just not hosting any mailboxes. They will require licenses as well.Mark Morowczynski|MCT| MCSE 2003:Messaging, Security|MCITP:ES, SA,EA|MCTS:Windows Mobile Admin|Security+|http://almostdailytech.com

Thanks!

Yes, it requires Excahnge license for each OS where you installed also keep in mind that installing Exchange on cluster node requires Enterprise Edition of Exchange server... -==-==-==-==-How to Buy Exchange Server 2007-==-==-==-==- Licensing Modes Exchange Server is licensed in the Server / Client Access License (CAL) model. Under this model,an Exchange Server license is required for each operating system environment running Exchange Server. A CAL is required for each user or device accessing Exchange Server. -==-==-==-==--==-==-==-==--==-==-==-==--==-==-==-==- HAROLD SCREWED UP ON EXCHANGE 2007 LICENSING!!! ->http://blogs.technet.com/haroldwong/archive/2007/04/07/harold-screwed-up-on-exchange-2007-licensing.aspx Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com