Permissions to monitor exchange 2010

Permissions to monitor exchange 2010

We're running OpManager 9200 and would like to being monitoring Exchange 2010.  The service account we use for OpManager/WMI is a member of the domain admins group but some items we want to monitor are showing up as N/A.  Are there exchange permissions we need correctly monitor the server(s)?

Memory
       
  Active Mailbox Delivery Queue Length N/A
  Active Remote Delivery Queue Length N/A
  Messages Queued For Delivery Per Sec N/A
  Messages Received Per Second N/A
  Messages Sent Per Second N/A
  Messages Submitted Per Second N/A
  Retry Mailbox Delivery Queue Length N/A
  Retry Remote Delivery Queue Length N/A

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