Hello HarmonyL,
I searched our online knowledgebase and found a few solutions that may help you print Envelopes:
Our office recently moved and our xerox, that was always a network printer, went from printing #10 envelopes effortlessly to "resources held." The correct envelopes are loaded into the bypass tray and the Xerox recognizes them; however, they will not print. I have changed the tray options in the window print options window, as well as even attempted loading the envelopes in a paper tray (sized to envelopes). Getting increasingly frustrated, someone help a beginnier office admin, please!