Enabling Debug Verbose Logging in ConfigMgr SCCM. Debug and Verbose provides additional information on error conditions for clients and servers. Setting this flag automatically triggers more information in the logs and does not require a reboot or restart of the system.
Enabling Debug Verbose Logging in ConfigMgr SCCM
To enable debug logging after installation, create the following registry key:
To enable verbose logging after installation, change the following value to 0.
(You will need to right click on the @Global key and change permissions to allow the current user to change the data in the key)
You’re done! Log files should now start producing A LOT more information.
32bit Windows Server
64bit Windows Server
Create a new KEY called “DebugLogging” and provide a string value “Enabled” to the default key.
MSDN Blogs and One of my post about the same topic with more details https://anoopcnair.com/2012/11/12/configmgr-sccm-how-to-turn-on-verbose-sql-nal-logging/