Offline file policy is a method of accessing network files offline when the network is unavailable. You can enable in windows to make available network files offline without VPN or cellular connections also sometimes you can suffer from no connection so the files will be disappeared, by enabling it keeps a cached copy of network files on your computer so you can access to the files faster or less bandwidth, to enable offline files policy in your computer just follow the steps.
Enable Offline Files Policy in Server
You can enable offline files policy in windows server to let your clients access files from the cached copy of network files from their local computer anytime.
1. Start Run type gpedit.msc to open Group Policy Management Console, navigate to Computer configuration> Administrative Templates>Network then open Offline files.

2. Now navigate to Configure slow-link mode then open it then click enabled, scroll down in the options and click on show, type * in the value name then type latency=1 in the value.

After enabling this your files will be available offline to your clients computers.
Enable offline Files Policy in windows
1. Go to control panel>sync center>manage offline files then open it and click Enable offline files, it will be enabled then you can view your offline files, manage and work with offline files.

The offline files policy is enabled and you can view, manage offline files.
Disable offline Files Policy
To disable offline files policy in server go to GPO(group policy management) then navigate to Computer configuration> Administrative Templates>Network> Offline files open configure slow-link mode and click Not configured then enter.

To disable offline files policy in windows, go to control panel>sync center>manage offline files then disable offline files, it will be successfully disabled.

You’re all done, if you have any question regarding this then ask us here.