When policy is no longer applied, would you like to remove the group or the members added to the group? Choose 'Yes' to remove ...

When policy is no longer applied, would you like to remove the group or the members added to the group? Choose 'Yes' to remove the group.  The action mode will be changed to 'Replace'. Choose 'No' to remove the members added to the group. The action mode will be changed to 'Update'.