How to view Exchange installed certificates in exchange management shell?
Simple run Exchange Management Shell an run the command: Get-ExchangeCertificate | fl

Verb: Services inform you with services use this certificate.
In my example this is IMAP, POP, IIS and SMTP services.

Error in SCCM 2007 – Failed to Run Task Sequence 0×80072EE7
When I deployed operating system task to group of computers I received this error:
Failed to Run Task Sequence!
?
In log file of SCCM client X:\Windows\Temp\SMSTSLog\smsts.log I fund this:
<![LOG[Setting wizard error: An error occurred while retrieving policy for this computer? (0x80072EE7). For more information, please [...]

Windows Server 2008 R2 Beta is ready to download.
Microsoft published new version of their operating system for testing.
Top 10 Reasons to Upgrade to Windows Server 2008 R2:
1. Powerful Hardware and Scaling Features.
2. Reduced Power Consumption.
3. Hyper-V??c in Windows Server 2008 R2 (live migration).
4. Increased Desktop Management Efficiencies.
5. Easier and More Efficient Server Management.
6. PowerShell 2.0.
7. [...]

How to install Hyper-V on Windows Server 2008?
This is stable virtualization environment in 5 minutes.
Step 1. Take a look that Your processor support virtualization (models VT-x or AMD-V).
Step 2. System Windows Server 2008 must have version x64.
Step 3. Confirm that update ?Hyper-V Update for Windows Server 2008 x64 Edition KB950050??? is installed.
Step 4. Run ??oServer [...]