Event ID 1237 messages in the Storage Replica Admin event log on the destination server show the number of bytes copied and bytes remaining every 10 seconds. You can also use the Storage Replica performance counter on the destination showing \\Storage Replica Statistics\\Total Bytes Received for one or more replicated volumes. You can also query the replication group using Windows PowerShell. For instance, this sample command gets the name of the groups on the destination then queries one group named Replication 2 every 10 seconds to show progress:
Get-SRGroup
do{
$r=(Get-SRGroup -Name "Replication 2").replicas
[System.Console]::Write("Number of remaining bytes {0}`n", $r.NumOfBytesRemaining)
Start-Sleep 10
}until($r.ReplicationStatus -eq 'ContinuouslyReplicating')
Write-Output "Replica Status: "$r.replicationstatus