Finding a dedicated ATI ES1000 video controller driver for Windows Server 2019 x64 can be challenging because the hardware is considered legacy. Official support from and manufacturers like Supermicro effectively ended before Windows Server 2019 was released.
Older 64-bit drivers for Windows Server 2003, 2008, or Windows 7/Vista exist and can sometimes be forced onto newer systems. Installation Strategies Finding a dedicated ATI ES1000 video controller driver
: You likely won't achieve resolutions higher than 1600x1200 at 16-bit color, or 1280x1024 at 32-bit color. or 1280x1024 at 32-bit color.