SCOM 2012 R2 & Exchange 2007 A scheduled discovery task was not started because the previous task for that discovery was still executing.

Hi,

I had recive the follwoing error in CCR Nodes, and unable to discover the CCR or SCCR nodes due to below error:

A scheduled discovery task was not started because the previous task for that discovery was still executing.

Discovery name: Microsoft.Exchange2007.ServerRole.CcrNode.Standalone.Discovery
Discovery name: Microsoft.Exchange2007.ServerRole.Mailbox.OnCluster.Discovery
Discovery name: Microsoft.Exchange2007.ServerRole.CcrNode.WithCluster.Discovery

I found Similar Question, but there are no answer for them

http://social.technet.microsoft.com/Forums/en-US/22f269c3-3036-4c0c-9ef4-b0b72fc4d6a9/a-scheduled-discovery-task-was-not-started?forum=operationsmanagergeneral

http://social.technet.microsoft.com/Forums/en-US/326517a8-e427-412f-bbe0-84bc7721ac47/health-service-event-10000-a-scheduled-discovery-task-was-not-started-because-the-previous-task-for?forum=operationsmanagergeneral