To help any support professional....
Troubleshooting:
Windows feature lets you generate a memory dump file by using the keyboardhttp://support.microsoft.com/kb/244139
Enabling debug logging for the Net Logon servicehttp://support.microsoft.com/kb/109626
Troubleshoot domain verification issues in Office 365http://support.microsoft.com/kb/2515404
How to troubleshoot Identity Federation client devices in Office 365http://support.microsoft.com/kb/2530713
How to troubleshoot calendar issues in Microsoft Outlook, Microsoft Exchange Server 2007, and Microsoft Exchange Server 2010http://support.microsoft.com/kb/971878
more to come...