Exchange 2007 Global Cmdlets overview.
 

• Global Cmdlest
  Test-ServiceHealth
  Test-SystemHealth
  Get-ExchangeServer
  Set-ExchangeServer
  Get-EventLogLevel
  Set-EventLogLevel
  Get-ExchangeAdministrator
  Add-ExchangeAdministrator
  Remove-ExchangeAdministrator
  Get-OrganizationConfig
  Set-OrganizationConfig
  Get-ExchangeCertificate
  New-ExchangeCertificate
  Import-ExchangeCertificate
  Export-ExchangeCertificate
  Remove-ExchangeCertificate
  Enable-ExchangeCertificate
  Get-ADPermission
  Add-ADPermission
  Remove-ADPermission