I am not in front of my lab right now, but you could try initializing it to $NULL:
$Backlog = Invoke-Expression -Command $BLCommand
$BackLogFilecount = $NULL
foreach ($item in $Backlog)
…
…
and see if that accurate reports the information.

Please let me know if that helps.
— Mark

How do most use this script, do they setup in the task scheduler or something different?

“The term ‘dfsrdiag’ is not recognized as the name of a cmdlet, function, script file, or operable program. Check the sp
elling of the name, or if a path was included, verify that the path is correct and try again.”

This script actually uses the dfsrdiag.exe application to determine backlog.

So, it looks like you are running this on a Domain Controller since it is detecting the SYSVOL shares. What troubles me is that:
1. dfsrdiag.exe is not in the path (or even on the system)
2. the DFSR groups you created aren’t showing up when querying the WMI provider.

Can you verify that the DFS Replication feature is enabled on the Domain Controller (Under File Service Role)?
When the DFS Replication feature is installed, the dfsrdiag.exe should show up in the path.
Also, make sure that the Replication Group configuration has the domain controller as one of the members.
If not, then should log into one of the members of the replication group, make sure you can run dfsrdiag.exe from a command line, and then try the script.

Let me know what you find out. I would love to assist further, if possible.

Thanks,
— Mark

Here is the output and what happens.

PS C:\Windows\system32> ######################################################################
PS C:\Windows\system32> ######################################################################
PS C:\Windows\system32> ## Main
PS C:\Windows\system32> ## Errors written:
PS C:\Windows\system32> ## Log File: Application
PS C:\Windows\system32> ## Source: Check-DFSR Script
PS C:\Windows\system32> ## ID: 9500 – Lists fully replicated replication folders
PS C:\Windows\system32> ## ID: 9501 – Lists replication folders with less than the $BacklogErrorLevel files waiting
PS C:\Windows\system32> ## ID: 9502 – Lists replication folders with more than the $BacklogErrorLevel files waiting
PS C:\Windows\system32> ## ID: 9503 – If a connection is not pingable, this event is written.
PS C:\Windows\system32>
PS C:\Windows\system32> $BacklogErrorLevel = 10
PS C:\Windows\system32>
PS C:\Windows\system32> $ComputerName = $env:ComputerName
PS C:\Windows\system32> ## Query DFSR groups from the local MicrosftDFS WMI namespace.
PS C:\Windows\system32> $DFSRGroupWMIQuery = “SELECT * FROM DfsrReplicationGroupConfig”
PS C:\Windows\system32> $RGroups = Get-WmiObject -Namespace “root\MicrosoftDFS” -Query $DFSRGroupWMIQuery
PS C:\Windows\system32>
PS C:\Windows\system32>
PS C:\Windows\system32> ## Setup my variables
PS C:\Windows\system32> $ping = New-Object System.Net.NetworkInformation.Ping
PS C:\Windows\system32> $SuccessAudit = $Null
PS C:\Windows\system32> $WarningAudit = $Null
PS C:\Windows\system32> $ErrorAudit = $Null
PS C:\Windows\system32> $EventSource = “Check-DFSR Script”
PS C:\Windows\system32> $SuccessEventID = 9500
PS C:\Windows\system32> $WarningEventID = 9501
PS C:\Windows\system32> $ErrorEventID = 9502
PS C:\Windows\system32> $NoPingEventID = 9503
PS C:\Windows\system32>
PS C:\Windows\system32> foreach ($Group in $RGroups)
>> {
>> ## Cycle through all Replication groups found
>> $DFSRGFoldersWMIQuery = “SELECT * FROM DfsrReplicatedFolderConfig WHERE ReplicationGroupGUID=’” + $Group.Replicat
ionGroupGUID + “‘”
>> $RGFolders = Get-WmiObject -Namespace “root\MicrosoftDFS” -Query $DFSRGFoldersWMIQuery
>>
>> ## Grab all connections associated with a Replication Group
>> $DFSRConnectionWMIQuery = “SELECT * FROM DfsrConnectionConfig WHERE ReplicationGroupGUID=’” + $Group.ReplicationG
roupGUID + “‘”
>> $RGConnections = Get-WmiObject -Namespace “root\MicrosoftDFS” -Query $DFSRConnectionWMIQuery
>> foreach ($Connection in $RGConnections)
>> {
>>
>> $ConnectionName = $Connection.PartnerName.Trim()
>> $IsInBound = $Connection.Inbound
>> $IsEnabled = $Connection.Enabled
>>
>> ## Do not attempt to look at connections that are Disabled
>> if ($IsEnabled -eq $True)
>> {
>> ## If the connection is not ping-able, do not attempt to query it for Backlog info
>> $Reply = $ping.send(“$ConnectionName”)
>> if ($reply.Status -eq “Success”)
>> {
>>
>>
>> ## Cycle through the Replication Folders that are part of the replication group and run DFSRDIAG tool
to determine the backlog on the connection partners.
>> foreach ($Folder in $RGFolders)
>> {
>> $RGName = $Group.ReplicationGroupName
>> $RFName = $Folder.ReplicatedFolderName
>>
>> ## Determine if current connect is an inbound connection or not, set send/receive members accordi
ngly
>> if ($IsInBound -eq $True)
>> {
>> $SendingMember = $ConnectionName
>> $ReceivingMember = $ComputerName
>> }
>> else
>> {
>> $SendingMember = $ComputerName
>> $ReceivingMember = $ConnectionName
>> }
>> $Out = $RGName + “:” + $RFName + ” – S:”+$SendingMember + ” R:” + $ReceivingMember
>> Write-Host $Out
>> ## Execute the dfsrdiag command and get results back in the $Backlog variable
>> $BLCommand = “dfsrdiag Backlog /RGName:’” + $RGName + “‘ /RFName:’” + $RFName + “‘ /SendingMe
mber:” + $SendingMember + ” /ReceivingMember:” + $ReceivingMember
>> $Backlog = Invoke-Expression -Command $BLCommand
>>
>> $BackLogFilecount = 0
>> foreach ($item in $Backlog)
>> {
>> if ($item -ilike “*Backlog File count*”)
>> {
>> $BacklogFileCount = [int]$Item.Split(“:”)[1].Trim()
>> }
>>
>> }
>>
>>
>> if ($BacklogFileCount -eq 0)
>> {
>> #Update Success Audit
>> $SuccessAudit += $RGName + “:” + $RFName + ” is in sync with 0 files in the backlog from
“+ $SendingMember + ” to ” + $ReceivingMember +”.`n”
>>
>> }
>> elseif ($BacklogFilecount -lt $BacklogErrorLevel)
>> {
>> #Update Warning Audit
>> $WarningAudit += $RGName + “:” + $RFName + ” has ” + $BacklogFileCount + ” files in the b
acklog from ” + $SendingMember + ” to ” + $ReceivingMember + “.`n”
>> }
>> else
>> {
>> #Update Error Audit
>> $ErrorAudit += $RGName + “:” + $RFName + ” has ” + $BacklogFilecount + ” files in the bac
klog from ” + $SendingMember + ” to ” + $ReceivingMember + “.`n”
>> }
>> #Write-Host + $Folder.ReplicatedFolderName “- ” $BackLogFilecount -foregroundcolor $FGColor
>> }
>> }
>> else
>> {
>> Write-Host $ConnectionName “is not pingable”
>> $NoPingMessage = “Server “”" + $ConnectionName + “”" could not be reached.`nPlease verify it is on th
e network and pingable.”
>> Write-Event $EventSource $NoPingEventID “Warning” $NoPingMessage “Application”
>> }
>> }
>>
>> }
>>
>> }
>> ## Write my events to the local Application log.
>>
Domain System Volume:SYSVOL Share – S:MYDC05 R:MYDC01
The term ‘dfsrdiag’ is not recognized as the name of a cmdlet, function, script file, or operable program. Check the sp
elling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:9
+ dfsrdiag <<<< Backlog /RGName:'Domain System Volume' /RFName:'SYSVOL Share' /SendingMember:MYDC05 /ReceivingMember:M
VDC01
+ CategoryInfo : ObjectNotFound: (dfsrdiag:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Domain System Volume:SYSVOL Share – S:MYDC04 R:MYDC01
The term 'dfsrdiag' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the sp
elling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:9
+ dfsrdiag <<<< Backlog /RGName:'Domain System Volume' /RFName:'SYSVOL Share' /SendingMember:MYDC04 /ReceivingMember:M
VDC01
+ CategoryInfo : ObjectNotFound: (dfsrdiag:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Domain System Volume:SYSVOL Share – S:MYDC02 R:MYDC01
The term 'dfsrdiag' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the sp
elling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:9
+ dfsrdiag <<<< Backlog /RGName:'Domain System Volume' /RFName:'SYSVOL Share' /SendingMember:MYDC02 /ReceivingMember:M
VDC01
+ CategoryInfo : ObjectNotFound: (dfsrdiag:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Domain System Volume:SYSVOL Share – S:MYDC03 R:MYDC01
The term 'dfsrdiag' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the sp
elling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:9
+ dfsrdiag <<<< Backlog /RGName:'Domain System Volume' /RFName:'SYSVOL Share' /SendingMember:MYDC03 /ReceivingMember:M
VDC01
+ CategoryInfo : ObjectNotFound: (dfsrdiag:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Domain System Volume:SYSVOL Share – S:MYDC01 R:MYDC02
The term 'dfsrdiag' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the sp
elling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:9
+ dfsrdiag <<<< Backlog /RGName:'Domain System Volume' /RFName:'SYSVOL Share' /SendingMember:MYDC01 /ReceivingMember:MY
DC02
+ CategoryInfo : ObjectNotFound: (dfsrdiag:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Domain System Volume:SYSVOL Share – S:MYDC01 R:MYDC03
The term 'dfsrdiag' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the sp
elling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:9
+ dfsrdiag <<<< Backlog /RGName:'Domain System Volume' /RFName:'SYSVOL Share' /SendingMember:MYDC01 /ReceivingMember:J
VDC02
+ CategoryInfo : ObjectNotFound: (dfsrdiag:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Domain System Volume:SYSVOL Share – S:MYDC01 R:MYDC04
The term 'dfsrdiag' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the sp
elling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:9
+ dfsrdiag <<<< Backlog /RGName:'Domain System Volume' /RFName:'SYSVOL Share' /SendingMember:MYDC01 /ReceivingMember:E
VDC01
+ CategoryInfo : ObjectNotFound: (dfsrdiag:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

Domain System Volume:SYSVOL Share – S:MYDC01 R:MYDC05
The term 'dfsrdiag' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the sp
elling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:9
+ dfsrdiag <<< if ($SuccessAudit -ne $Null)
>> {
>> Write-Event $EventSource $SuccessEventID “Information” $SuccessAudit “Application”
>> }
>>
PS C:\Windows\system32> if ($WarningAudit -ne $Null)
>> {
>> Write-Event $EventSource $WarningEventID “Warning” $WarningAudit “Application”
>> }
>>
PS C:\Windows\system32> if ($ErrorAudit -ne $Null)
>> {
>> Write-Event $EventSource $ErrorEventID “Error” $ErrorAudit “Application”
>>
>>

nope, i don’t see it, command worked but the list/table is empty.

If you just do a :
Get-WmiObject -Namespace “root\MicrosoftDFS” -query “SELECT * FROM DfsrReplicationGroupConfig” | Select-Object ReplicationGroupName

Do you see your replication group (non-SYSVOL) that you created?

Mark

I am running win2k8 R2 with DFS-R replication group.

— Mark