Similar to Lodging Per Diems, MIE represent Meals and Incidental Expense Per Diems which are fixed per diem rates per date range which are then selectable in the Expense report.
MIE Expense types may also have overages split out via creating a separate expense type and tying that overage expense type to the main MIE Allowable Expense type.
Note that the MIE Expense Types are slightly different from the Lodging Expense Types in that the Overage Expense type for MIE is tied to the MIE Allowable Expense type wizard (not the MIE Per Diem Expense Type wizard).
Navigate to Admin > Setup > Expense Types.
Navigate to Admin > Setup > Expense Types > Edit Pencil Icon > Wizard tab.