Download details, System Requirements and Prerequisites:
http://www.microsoft.com/downloads/d...displaylang=en

Help file:
http://www.microsoft.com/downloads/d...6-102eddf8a7c4
Hosting Deployment Guide for Exchange Server 2010 SP1 Beta
http://www.microsoft.com/downloads/e...displaylang=en

Release notes:
http://technet.microsoft.com/en-us/l.../ff728620.aspx

Protocol Documentation:
http://www.microsoft.com/downloads/d...9-9ed6093d6d7f

New Isinteg cmdlets:

New-MailboxRepairRequest
http://technet.microsoft.com/en-us/l.../ff625226.aspx

New-PublicFolderDatabaseRepairRequest
http://technet.microsoft.com/en-us/l.../ff718234.aspx

EHLO announcement:
http://msexchangeteam.com/archive/20...25/455861.aspx

FAQ and Known Issues:
http://msexchangeteam.com/archive/20...01/456094.aspx

http://blogs.technet.com/b/isablog/a...rotection.aspx