By creating a Time machine profile you can specify a backup server location used to mount and backup the device.

Procedure

  1. Navigate to Resources > Profiles & Baselines > Profiles and select Add. Select Apple macOS, and then select Device Profile, since this profile is only applicable to the entire device.
  2. Configure the profile's General settings.
  3. Select the Time machine payload.
  4. Configure Time machine settings, including: 
    Setting Description
    Backup all volumes Secure all volumes associated with the device. By default, only the startup volume is backed up.
    Backup system files and folders Secure all system files and folders, which are skipped by default.
    Enable automatic backup Back up the system automatically at determined intervals.
    Enable local snapshots (10.8+) Configure local backup snapshots when device is not connected to the network.
    Backup size limit Set a maximum size allowed to backup the system. Enter 0 (zero) to set unlimited.
    Paths to backup Choose specific filepaths to backup, in addition to the default startup volume.
    Paths to skip Choose specific filepaths to skip during backup from the startup volume.
  5. Select Save & Publish when you are finished to push the profile to devices.

Results

Once the profile is pushed to the device, the login user's network credentials are used to configure the system keychain for the backup volume defined in the profile. The backup volume will not mount using a local account because network credentials are required at login to authenticate the drive. After the system keychain is configured the first time, all backups from that computer will be associated with the original user's backup volume.