You have to select envelope and the size through the control panel of the ICMF 5550/5530.
Press <Menu> and then press <>, you will see [2.COMMON SETTINGS].
Press <Set> 3 times.
Press <> to select [ENVELOPE], and then press <Set>.
Press <> to select the correct envelope size, and then press <Set>.
Press <Stop/Reset>.
Open Microsoft Word.
Click on [File] then [Print]. Make sure the imageCLASS MF printer is selected then click on Properties. Change the Paper Size to the appropriate size envelope (normally COM10).
Click [OK], and then [Cancel] or [Close] (depending on the operating system).
Click on [Tools] and then [Envelope and Labels]. Fill out the "Delivery address:" and "Return address:" as required.
Click on [Options]. Make sure that you have the proper envelope size selected under "Envelope size".
Click on [Printing Options]. Make sure you the proper feed method and feed from location selected. Click [OK], and then [Print] and the envelope should print with no error.
If you get a message on the printer control panel [CHANGE PAPERSIZE TRAY: LTR], the correct paper size is not set correctly in either the printer driver or the printer itself.
If you get a message on the printer control panel flashing between [INCORRECT PAPERSIZE TRAY: LTR] and [MP PAPER MISMATCH], the paper size settings are incorrect at the machine and the printer driver.