Oh wow! thanks, that worked. Never looked into this setting. seems like there are multiple places where settings need to be updated. just tried it and one of the cameras picked up motion as expected.
I am new to this forum and been reading about NVR/security solutions for last few weeks. We are building a new home and I decided to (after reading posts here) go with Dahua based system. I bought Empiretec NVR5232 (thanks Andy) and Empiretech 4k-x 8Mp and Loryata T5442 cameras to get started...