When using the Epson Standard print driver for WF-C21000, the Equitrac rules for Force Monochrome or Force Duplex does not have the desired result. The Epson Universal print driver for that model works as expected.
A workaround is to use the Epson Universal print driver.
If the Standard driver is required, a hotfix for Equitrac Office / Equitrac Express 5.7 and ContolSuite 1.1 will be available.
Please contact Kofax support for further details.