Vivotek NR9682-v2 64-Channel NVR (No HDD) - Manual (Page 245)

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User's Manual - 245
When done with the privilege settings, click Add to create a new user.
The new users will be listed under the Administrator's icon. Repeat the process to create more users.
In the Accessible devices tab, click to select the cameras that a user can access. Some users may only
need to access specific devices.
Note that you can place a limitation on a user's access right to the recorded videos by setting a barrier
for access to the older recordings. Recordings older than a configurable period of time will not be
accessible.