And don’t install KB2506146 on SBS 2008 either

Windows Management Framework 3.0 / PowerShell 3.0 and Exchange - Michael's meanderings…:
http://theessentialexchange.com/blogs/michael/archive/2012/12/13/windows-management-framework-3-0-powershell-3-0-and-exchange.aspx

While you are at it, don't install WMF 3.0 on SBS 2008 either.

Windows Management Framework 3.0 for Windows Server 2008 (KB2506146)

Locale: All
Deployment: Optional/Automatic Updates, WSUS, and Catalog
Classification: Updates, Non-Security
Target platforms: Windows Server 2008
Approximate file sizes:

• Windows Management Framework 3.0 for Windows Server 2008 update: ~ 10778KB
• Windows Management Framework 3.0 for Windows Server 2008 for x64-based Systems update: ~ 14804KB

Description:
Windows Management Framework 3.0 provides updated management functionality for Windows Server 2008. Windows Management Framework 3.0 includes Windows PowerShell 3.0, WMI, and WinRM 3.0, along with other management features.

About the author

Susan Bradley, SBS Diva Blog

Susan is just a wacko SBSer who started down her path by hanging out in the SBS newsgroup community. She's not a Microsoft employee or affiliated with Microsoft. Get a feel of the SBS “vibe” and join in the SBS community!