1. The first step to follow before enabling best practices check in Microsoft Dynamics Ax 2012 is to Go to Tools -> Options and select Best Practices.
2. In the next step, select the Best Practices option in the Tools window and ensure that the best practices are set across all the nodes in the table.
3. The next step is to set the Diagnostic Level to Level 4. This will trigger the best practice check in the MorphX framework.
4. Under Diagnostic level, choose Level 4.