By default, all source columns are included in a migration. You can use this filter option to select specific columns that you want to exclude. Excluded columns and their data will not be migrated to the target, but the rest of their data will still be migrated.
NOTE: The name of this feature depends on the level of the migration. For site collection or site-level migrations the option is called Apply filter on Site Columns. If the migration is at the list level or below, the option is called Apply filter on List Columns.
To apply Site or List Column filters:
1.Click the […] button to the right of the Apply filter on Site (or List) Columns option to display the Filter [Object] dialog.
2.From the Columns to Copy section, highlight the columns from the source that you want to exclude.
NOTE: By default, columns show the Display Names, but you can, alternatively, choose to show Internal Names (by clicking [Show Internal Names]).
3.Click the right-facing arrow to move columns to the Columns to Exclude section.
NOTE: If you want to return columns to the Columns to Copy section, click the left-facing arrow.
4.When you have finished selecting columns to exclude, click [OK].
