Update—April 15, 2009
Microsoft today launched the public beta for Microsoft Exchange Server 2010 (previously code-named Exchange 14). You can get more details about the new version of Exchange Server in the following articles from Windows IT Pro:

In an apparent slip up, Microsoft might have inadvertently announced the official name of the next version of Exchange Server: Microsoft Exchange Server 2010. The fact that this should be the name really shouldn’t be a surprise to anyone, of course, considering the expected timeframe of its release, late 2009 or early 2010.

After an update to its Download Center yesterday, the name Microsoft Exchange Server 2010 appeared in the list of Exchange downloads temporarily; see the screenshot below. During development, this release has been called by the code name Exchange 14.

 Stay tuned to windowsitpro.com and we’ll give you all the info you need on this new version as soon as Microsoft makes it public.