Exchange 2010 : Cannot add a second DAG member

Hi, today I will talk about this error : Microsoft.Exchange.Cluster.Replay.DagTaskOperationFailedException: A server-side database availability group administrative operation failed. Error: The operation failed. CreateCluster errors may result from incorrectly configured static addresses. Error: An error occurred while attempting a cluster operation. Error: Cluster API ‘”AddClusterNode() (MaxPercentage=100) failed with 0x5b4. Error: This operation returned because the timeout period expired”‘ failed. —> Microsoft.Exchange.Cluster.Replay.AmClusterApiException: An Active Manager operation failed. Error An error occurred while attempting a cluster operation. Error: Continue reading Exchange 2010 : Cannot add a second DAG member

Error 801: SCVMM Cannot find ISO object

Hi, This error can occur if you mount an ISO in a VM from the SCVMM 2012 SP1 Library, delete the ISO file from the Library (How coult it be possible? Admins can !) then try to remove the ISO from the VM. At this step you cannot clone the VM, create  a template from it or delete it. You could have  the error 801 if you try to remove the host from the cluster Continue reading Error 801: SCVMM Cannot find ISO object