The Microsoft Exchange Server 2010 management pack is designed for monitoring Exchange Server 2010 events, collecting Exchange component-specific performance counters in one central location, and for raising alerts for operator intervention as necessary. You will need System Center Operations Manager 2007 to run and monitor Exchange Server 2010 with this management pack.
Get it from here: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=a0047276-553c-4054-afc9-ec3b4ececf3c#tm
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