We currently purchased WorkCentre 3325 and have not been able to scan a Legal document to Network from the ADF.
The specs say that the ADF scans legal but couldn't find where to change the paper size:
Duplex Automatic Document Feeder
Capacity: 50 sheets
Size: 5.6 x 5.8 in. to 8.5 x 14 in.
(142 x 148 mm to 216 x 356 mm)
I have read the manual but doesn't specify how to change the scan paper size.