Exception handling in Plugin in MS CRM using Plugin Trace log feature http://www.magnifez.com/exception-handling-in-plugin-in-ms-crm-using-plugin-trace-log-feature/
Debugging CRM Plug-ins with the Plug-in Trace Log https://www.google.it/amp/s/www.powerobjects.com/2016/07/05/debugging-your-plug-ins-with-the-plug-in-trace-log/amp/
How to debug a custom workflow activity in Dynamics CRM https://ssharmacrm.wordpress.com/2015/06/22/how-to-debug-a-custom-workflow-activity-in-dynamics-crm/
How to debug a plugin in Dynamics 365 online using plugin profiler – Microsoft Dynamics 365 https://dynamics365blocks.wordpress.com/2016/12/06/how-to-debug-a-plugin-in-dynamics-365-online-using-plugin-profiler/amp/