nvr hikvision

Hello, I have a problem with the Hikvision NVR, I can't turn on the Virtual server function, I'm attaching a photo. Thank you for your help.

Hello, Im newbie in this forum, also newbie in IPCAM installation. so i have 4-6 IP CAM that needs to be connect PoE switch because our main office is prolly 100-120 meters from our backyard. i want to put PoE Switch in around 60 meters from the cameras, before connect to our main office. my...