OpManager has a long list of WMI monitors that cover even Active Directory, MSSQL, Exchange etc. Here are a few self-learned tips to solve some of those common WMI issues easily. 

First, the WMI Diagnosis Utility-all out troubleshooter.

WMIDiag.vbs is a VBScript script designed to help you ascertain the current state of the WMI service on a computer. The download package includes the utility itself, a ReadMe file that discusses how the tool works (and how to best use it), and sample spreadsheets that provide information about the default WMI configuration on various versions of the Microsoft Windows operating system.
When you run this, it automatically repairs WMI services and generates a report of what is missed and what needs to be done. 
Okay. WMI is working fine. What next if you find some WMI counters not showing values in a particular device? How to check if the device has problems or not? Is there an easy way to query the device?
Yes, you can do that by using WMI Administrative Tools. Here is the overview from Microsoft’s site
WMI Tools include: 
WMI CIM Studio: view and edit classes, properties, qualifiers, and instances in a CIM repository; run selected methods; generate and compile MOF files. 
WMI Object Browser: view objects, edit property values and qualifiers, and run methods.
Download the tool from WMI Administrative Tools. You can use this to query the WMI classes in the device and get the values for those classes. It’s better than the default wbemtest tool located in C:\windows\system 32\wbem where you need to type the query in the SQL query format.
Happy Monitoring.
Rajasankar

  1. Thanks! for providing WMI tool link i have download it successfully