If you have Organizational Member Types in your system and want to know which profiles, if any, are unlinked (no longer linked to any organization profile in the system) you can use the Advanced Search in the Profile List to check!
Using the Search
Navigate to the Profile List, and click the Advanced Search By dropdown at the top left of the list, and select the Unlinked Profiles option.
In the box that appears, you can select as many different linked Member Types as you want to include in your search (selecting only one if you only want results to return for just that one Member Type, selecting any combination of Member Types, or all Member Types if you would like to see the full list of all unlinked profiles in your database.
When you have selected all your criteria, click "run this search"