I was just able to get this accomplished with stretch version and NFS to my Synology NAS.

Create the mount point you want: sudo mkdir /mnt/NAS

Mounted it manually first: sudo mount -t nfs 192.168.1.100:/volume1/video /mnt/NAS

Checked to make sure the path worked: cd /mnt/NAS ls -al

All was good, so put it into fstab for mounting at boot. I put this in at the very end of fstab: sudo nano /etc/fstab 192.168.1.100:/volume1/video /mnt/NAS nfs defaults 0 0

I rebooted and verified that it was there.

I hope you had the same success I did!

I was just able to get this accomplished with stretch version and NFS to my Synology NAS.

Create the mount point you want:

sudo mkdir /mnt/NAS

Mounted it manually first:

sudo mount -t nfs 192.168.1.100:/volume1/video /mnt/NAS

Checked to make sure the path worked:

cd /mnt/NAS
ls -al

All was good, so put it into fstab for mounting at boot. I put this in at the very end of fstab (edit via sudo nano /etc/fstab):

192.168.1.100:/volume1/video /mnt/NAS nfs defaults 0 0

I rebooted and verified that it was there.

I hope you had the same success I did!