"Troubleshooting NTDS Performance Data Retrieval Issues in SCOM"
Failure to retrieve the raw performance data for NTDS via WMI: the error returned was 'Object required' (0x1a8)" in SCOM
---
**Troubleshooting NTDS Performance Data Retrieval Issues in SCOM**
If you're encountering the error "Failure to retrieve the raw performance data for NTDS via WMI: the error returned was 'Object required' (0x1a8)" in SCOM, follow these steps to resolve the issue:
### Step-by-Step Troubleshooting
**1. Verify Performance Counter Availability:**
Ensure the NTDS performance counters are available and functioning correctly on the server.
```powershell
# List all NTDS counters
Get-Counter -ListSet NTDS
```
If the counters are not listed, you might need to reload the performance counters.
**2. Rebuild Performance Counters:**
Rebuild the performance counters on the affected server.
```cmd
# Open Command Prompt as Administrator
lodctr /r
```
**3. Check WMI Service:**
Ensure that the WMI service is running.
```powershell
Get-Service -Name Winmgmt
```
If the service is not running, start it.
```powershell
Start-Service -Name Winmgmt
```
**4. WMI Repository Consistency:**
Check the consistency of the WMI repository and repair it if necessary.
```cmd
# Open Command Prompt as Administrator
winmgmt /verifyrepository
# If inconsistencies are found, repair the repository
winmgmt /salvagerepository
```
**5. Permissions:**
Ensure the account running the SCOM agent has sufficient permissions to read the performance counters and WMI data. The account should be a member of the "Performance Monitor Users" group or have equivalent permissions.
**6. Check for Corrupt Performance Counter:**
If specific performance counters are corrupted, you may need to rebuild them.
```cmd
# Rebuild all performance counters
lodctr /R
# Register the WMI provider for performance counters
winmgmt /resyncperf
```
**7. Review Event Logs:**
Check the Event Viewer for any related errors or warnings that might give more insight into the problem.
```cmd
eventvwr.msc
```
**8. Test WMI Query:**
Manually test the WMI query for NTDS performance counters to see if you can retrieve data outside of SCOM.
```powershell
Get-WmiObject -Query "SELECT * FROM Win32_PerfFormattedData_NTDS_NTDS"
```
### Example PowerShell Script for Checking NTDS Performance Counter
Here’s an example script to check if the NTDS performance counter is working:
```powershell
try {
$counterPath = "\NTDS\LDAP New SSL Connections/sec"
$counterValue = Get-Counter -Counter $counterPath
if ($counterValue.CounterSamples) {
Write-Output "NTDS performance counter is available and returning data."
$counterValue.CounterSamples
} else {
Write-Output "NTDS performance counter is not returning data."
}
} catch {
Write-Output "Error retrieving NTDS performance counter: $_"
}
```
### Next Steps
1. Follow the above troubleshooting steps to identify and resolve the issue.
2. If the problem persists, consider reviewing the SCOM management pack documentation for any specific configurations or known issues.
3. If needed, escalate the issue to Microsoft support for further assistance.
Let me know if you need further assistance or if there's any specific step you'd like more details on.
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