Hello Exchanger, I have navigate the web and Microsoft web site as well but I did not find a real Comparison between EX03 and EX2010. could you please give me a link or main differences (Advantages and disadvantages) between both of them. And it's necessary to migrate to Exchange 2010 if Exchange 2003 work properly? I need to decide that, because in our company we are planning to Migration. I appreciate your Help in Advanced Regards

hi, the following links should help you http://en.wikipedia.org/wiki/Microsoft_Exchange_Server 1. licensing options http://www.microsoft.com/exchange/2010/en/us/licensing.aspx#ExCalCom 2.new features http://www.infoworld.com/d/applications/first-look-exchange-2010-beta-shines-485 http://technet.microsoft.com/en-us/library/bb124008.aspx http://searchexchange.techtarget.com/generic/0,295582,sid43_gci1372236_mem1,00.html http://www.simple-talk.com/sysadmin/exchange/upgrade-exchange-2003-to-exchange-2010/ and when u do decide the transition path could include http://blogs.dirteam.com/blogs/davestork/archive/2009/08/23/the-road-to-exchange-2010-migration-paths.aspx http://serverfault.com/questions/91090/moving-from-exchange-2003-to-exchange-2010

Hello Maher.salem, please go through these article it will help you:-- Microsoft Exchange Server 2010 - Comprehensive Feature list http://blog.taragana.com/index.php/archive/microsoft-exchange-server-2010-comprehensive-feature-list/ New Transport Functionality http://technet.microsoft.com/en-us/library/ee633463.aspxMicroSoft Exchange Admin. & Connector EXCHANGE2010, MCSE, MCTS, MCSA MESSAGING, CCNA & GNIIT

I'm going through the same process, I've spent alot of time searching for comparisions between ex03 and ex2010 but can't find anything usefull, I've already found most of the links listed above but they either describe the tranition between the two versions or compare ex2010s new features to ex07. Does anyone know of a comparitive feature list between 03 and 2010?

Per my research, there’s no officially published comparison table between exchange 2010 and the legacy versions But you can use the feature introductions about different versions to sum up the list What Is New in Exchange Server 2003 What Is New in Exchange Server 2010James Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com