Below is the useful collection of powershell command use in SCR environment. This command is tested on Microsoft Exchange 2007 SP1.
1) Check replication status
Get-StorageGroupCopyStatus -Identity "server1\testsg" -StandbyMachine "server2"|select StorageGroupName,SummaryCopyStatus,CopyQueueLength,lastlogcopied,ReplayQueueLength,lastlogreplayed,lastInspectedLogtime,lastloginspected
2) Enable SCR for storage group
Enable-StorageGroupCopy "server1\testsg" -StandbyMachine "server2" -ReplayLagTime 1.00:00:00 -TruncationLagTime 2.00:00:00
3) Disable SCR for storage group
Disable-StorageGroupCopy "server1\testsg" -StandbyMachine "server2"
4) Suspend SCR for storage group
Suspend-StorageGroupCopy -Identity "server1\testsg" -StandbyMachine "server2"
5) Resume SCR for storage group
Suspend-StorageGroupCopy -Identity "server1\testsg" -StandbyMachine "server2"
6) View setting for StandbyMachine
$sg = Get-StorageGroup "server1\testsg" $sg.StandbyMachines