Microsoft.com: - Official Microsoft website for Exchange Server
Microsoft Messaging and Mobility User Group - The Microsoft Messaging and Mobility User Group is a UK based group for people interested in both Microsoft Exchange and the Windows Mobile Devices that enable access to Exchange remotely. The website includes articles about Exchange and a place where, through the forums and blogs, everyone can give and receive help.
SlipStick - Utilities, how to's, code samples, discussions, chats, and other resources and other solutions for Microsoft Outlook and Microsoft Exchange
SearchExchange.com - SearchExchange.com, the source for news and tips on Microsoft Exchange and Outlook administration
TechTutorials.net - TechTutorials provides free computer reference information including a searchable directory of free tutorials, white papers, tips & tricks, FAQs, HOWTOs and other sources of free technical information that cover a wide range of computing and technology topics.
You Had Me at EHLO - This is an official team blog site of the Microsoft Exchange Team. Bloggers range from Exchange developers all the way to Exchange support engineers (and everything in between!)
TheEmailAdmin.com – Email management blog which covers the latest news, tips and how tos for email server administrators.
AllSpammedUp.com – Anti-spam blog which covers the latest developments in anti-spam and how businesses can deal with this ever increasing problem.
Elan Shudnow’s Blog –Elan Shudnow shares his Exchange knowledge with you in detailed posts and scenarios.
Subject: Exchange –Rui Silva shares tips on MS Exchange and messaging in general, news, technical articles, personal experiences and information about the new trends: mobility, unified messaging and PowerShell.
MSExchangeGuru.com – A team of Exchange Server enthusiasts provide you with high quality articles targeted to answer any MS Exchange related queries.
MS Exchange Tips – MS Exchange MVP, James Chong, is interested in providing resources to the MS Exchange community.
Exclusively Exchange – J. Peter Bruzzese, MSExchange,org contributor and Exchange instructor, shares some helpful videos and articles on Exchange.
Bhargav’s IT Playground –Exchange MVP and MCM, Bhargav Shukla shares some of his knowledge on Exchange.
Exchange Geek’s Weblog – A geeky side to understanding your Exchange Server.
EighTwOne (821)– Michel de Rooij’s blog focuses on Exchange or Exchange-related technologies like Active Directory.
Msunified.net – Technical blog about Exchange, OCS and Lync by Ståle Hansen
Anderson Patricio Get-news Blog – Here you can find webcasts, presentations, articles, tutorials and some Exchange KBs related to MS Exchange.
UCBlogs.net – Posts written by experienced engineers, administrators, writers and architects can be found here tackling subjects related to MS Exchange Server, MS Office Communications Server, and various third party products that help provide a unified messaging experience.
Glen’s Exchange Dev Blog – Glen Scales’s posts touch on a variety of MS Exchange topics you would want to read.