Accessing OneForce Last updated Save as PDF Description Refer to the section below on how to access OneForce if you are a registered user. Step 1: Access the OneForce website via Chrome Browser. Website: https://mercermarketplace.lightning.force.com/ Step 2: Single Sign On Enter your corporate email address if requested (generally first name-last name@mercer.com) then click Next. Step 3: For Five9 Softphone assistance refer to: Five9 Softphone Application User Guide (Multi LOB)