[NAME]  That's a possibility.  In that case, you'd want to get an E-Port II Plus docking station, which offers dual DisplayPort outputs.  They're pretty easy to find and inexpensive these days, especially if you can find one that only includes the dock with no power adapter, since you can reuse the power adapter you already have.
Have a Dell Latitude E6530 docked on a Dell PRO3X E-Port II docking station. There are two Dell U2518D monitors daisy chained with display port cables to the display port on the docking station. The laptop has a NVIDIA NVS 5200M graphics. Win10 will only recognize the first U2518 monitor but not the second. The second monitor just mirrors the display on the first monitor. Updated to the latest Intel and NVIDIA display drivers from the Dell site, but did not resolve this issue. In BIOS, Video Settings, tried the NVidia Optimus enable/disable settings did not resolve this issue, so left it enabled. With the exact same monitors and docking station setup, can dock a Latitude E5470 or Precision 3510 laptop. The monitors work great for an extended desktop across both displays. Is there a driver or video card limitation on the Latitude E6530?
Latitude E6530 Second Display on Display Port Mirrors the First Display