How much RAM can the HP EliteBook 630 G10 support, and can it be upgraded?

The HP EliteBook 630 G10 supports a maximum of 64 GB DDR4-3200 MHz RAM across 2 SODIMM slots. Both memory slots are accessible and upgradeable by IT or self-maintainers only, and the system supports dual channel memory. HP recommends using HP branded memory to ensure compatibility, as mixing memory speeds will cause the system to perform at the lower memory speed. (Page 3)