So often when interviewing or working with colleagues I often hear the question:

‘What is the best log file to look in if Updates are not deploying via ConfigMgr to clients????’

Well the answer is there is not just one. A number of log files work together to reflect the process of updates deploying and a few key ones I use are below:

Wsyncmgr.log
WUAHandler.log
Wsusctrl.log
WCM.log

Along with

Datatransfer.log
CAS.log

Often the issue will lie somewhere within these logs if the issues is specific to update deployment.

There is still the standard windowsupdate.log but I find the above are more granular where the issue lies if a problem was to occur!