To help any support professional....

Troubleshooting:

Windows feature lets you generate a memory dump file by using the keyboard
http://support.microsoft.com/kb/244139  

Enabling debug logging for the Net Logon service
http://support.microsoft.com/kb/109626  

Troubleshoot domain verification issues in Office 365
http://support.microsoft.com/kb/2515404  

How to troubleshoot Identity Federation client devices in Office 365
http://support.microsoft.com/kb/2530713  

How to troubleshoot calendar issues in Microsoft Outlook, Microsoft Exchange Server 2007, and Microsoft Exchange Server 2010
http://support.microsoft.com/kb/971878  

more to come...