Found the solution. Downloaded the drivers from Canon's website:
MF240SeriesMFDriverV2175W32usEN
Opened Windows 10 device manager
Updated driver from this folder
Note: #10 envelopes now show up in the printer paper selection.
Found the solution. Downloaded the drivers from Canon's website:
MF240SeriesMFDriverV2175W32usEN
Opened Windows 10 device manager
Updated driver from this folder
Note: #10 envelopes now show up in the printer paper selection.