Client can sync down to NFS share, but not upload back to cloud

Owncloud server, no external storage configured. Files in folder.

Owncloud client installed, and synchronizing between cloud folder and folder located on NFS/SMB share. \files\owncloud\sync\

Files placed in the cloud folder get synced down to NFS/SMB share, but files placed in the share don’t get synced back up to the cloud server.

However, it works as expected if synced folder is located on the machine the client is installed. ie: desktop/testfolder

Server configuration

Operating system: Ubuntu 16.0

Web server: Apache

ownCloud version: 10.5.0

Client configuration

Client version: 2.6.3

Operating system: Windows 10 pro x64

OS language: English

Qt version used by client package (Linux only, see also Settings dialog):

Installation path of client: C:\Program Files (x86)\ownCloud

Detecting local changes rely on file system events. Those are missing on the network volume.

Docs have a environment variable that can be used to improve here: OWNCLOUD_FULL_LOCAL_DISCOVERY_INTERVAL
(Default is 1h, you should choose shorter interval)

Where would I find this line? On the server or where the client is installed?

Client need to started with this environment variable set.

So I’m not to put it into the cfg file as shown? Because this didn’t work.

[General]
clientVersion=2.6.3 (build 13551)
logToTemporaryLogDir=true
optionalDesktopNotifications=true
showInExplorerNavigationPane=true

[ownCloud]
fullLocalDiscoveryInterval=60000

Yeah, config file works too:
https://doc.owncloud.com/desktop/advanced_usage/configuration_file.html

See, I’ve tried to edit it and put in the correct field, but I don’t think it’s working.
"[General]
clientVersion=2.6.3 (build 13551)
logToTemporaryLogDir=true
optionalDesktopNotifications=true
showInExplorerNavigationPane=true

[ownCloud]
fullLocalDiscoveryInterval=1"

I’ve used 1, I’ve used 6000 miliseconds which is one minute. Maybe I’m using the syntax incorrectly?