Dear Friend! you try below steps:
To modify the system time of a ViewPoint 8000 series MCU, perform the following operations:
1. Log in to the MCU web interface.
2. Choose Settings > System > Time.
3. Click the button for obtaining the operating system time to synchronize the system time of the MCU with that of the computer used for login.
The GMT time refers to the time in GMT+0 time zone. To modify the system time of a VP9000 series MCU, perform the following operations:
1. Log in to the MCU web interface.
2. Choose Settings > System > Time.
3. Modify the MCU time parameter.
Thanks!