Changes in Exchange Server 2007

Here is a list of things that were considered a requirement or limitation in exchange 2003 but we can say "NO" to, in exchange 2007:

• Installing SMTP and NNTP services prior to exchange 2007 installation not required anymore.
• No need to run ForestPrep and DomainPrep manually. Exchange 2007 installation will handle this automatically.
• OWA users don't need to have Microsoft Word, Excel, Powerpoint and even PDF reader installed to view attachment of these sort. The new OWA will convert them to HTML.
• You don't need a VPN tunnel if you have received a link to a file share or sharepoint service via OWA. The LinkAccess retrieves the document.
• If clients are running Outlook 2007 there is no need to worry about the configuration. Exchange Server 2007 automatically discovers the client and configures its Outlook profile upon log in.
• No need to consider Exchange Routing Groups anymore. The exchange routing topology is simplified and is build on existing Active Directory Sites.
• No "Recipient Update Service" anymore!
• No "Front-end" and "Back-end" servers! In the new modular architecture things are different and the "Edge-Transport" role takes the position of front-end which is also more secure. An outstanding security relief is that "Edge-Transport" does not need to be joined to the domain! I like this very much.
  
• There is no "Recipient Policies" in exchange 2007. Instead we have "Accepted Domains" and "Email Address Policy". Changes to recipients apply in real-time now.
  
• In Exchange 2003, Journaling was possible at the mail-box level but Exchange 2007 has gone beyond that and journaling can be accomplished per-database, per-user, per-distribution group and also it can be narrowed to internal or external emails.
• No "Storage" size limit on Exchange 2007 Standard Edition (75GB on Exchange 2003+SP2)
• Global Address List browsing is possible in OWA 2007 like it is in Microsoft Outlook (We could only search GAL in OWA 2003)

Well, there are more cool stuff in Exchange 2007 and this list just points out the facts that I was interested in so it is incomplete because my knowledge on new features in Exchange 2007 is not thorough.
I will try to add more lines to this list upon progress in my findings.