Use BI to duplicate Report Builder "Show only mapped users" checkbox function

Summary

I want to duplicate the function of UNCHECKING the "show only mapped users" checkbox in Report Builder: generating a list of ALL LMS users and showing their statuses for some learning plans.

Content

Our training admins use Report Builder to validate that all users have been assigned mandatory training, using the following settings:

• All approved users
• Select only the Learning Plans in question (often multiple at a time)
• Uncheck the box "show only mapped users"

I've attached a sample of the report output.  It shows that one of the employees was assigned his mandatory training, but the other was not.  By cross-checking between "user type," "item name," and "item assigned date," I can identify that this user was left out of the assignment, and fix it.