I made a purchase of HP 8600 pro printer and each and every features were working all well , but I did not tried with feature of printing envelope. I made some settings to try with if printing was possible but all in vain. I made further attempts to change the sixe but was with same result. So I was with something like “the settings do not match the envelope” repeatedly . I have installed Office 2010 pro and currently with windows 7 operating system and was not able to print envelopes on this printer. So I am not knowing much regarding the same and made several attempts to solve this , but it was not solved either. Can you guys help me out of this as I am not able to solve this one . please let me know some definite solutions to try with .