Huh? Dell makes monitors that don't support VESA mounts?
I'm 99% sure this monitor has a the ability for a VESA mount. The specs you linked say it has. According to Dell they even sell the thing without a stand, that wouldn't make sense if it didn't have another way to mount it.
The manual explains the VESA mount: https://dl.dell.com/manuals/all-products/esuprt_display_projector/esuprt_display/dell-p2417h-monitor_user's_guide_en-us.pdf