This policy setting changes the default round trip network latency value above which network files are cached by client computers ...

This policy setting changes the default round trip network latency value above which network files are cached by client computers in the branch. BranchCache for network files enables computers in a branch office to cache data from Intranet servers on which BranchCache is enabled, and then securely share the files with other computers in the branch. One of the content types that can be cached in a branch office is network files using the Server Message Block (SMB) protocol.

By default, network files are cached in the branch office when the round trip network latency of the wide area network (WAN) link is above 80 ms. To always cache network files downloaded to computers in the branch office, set the network latency value to 0. To disable branch caching for network files, set the latency value to a very high value.

If you enable this policy setting, you can configure the round trip network latency above which network files should be cached by client computers in the branch office.

If you disable or do not configure this policy setting, the client computer will cache network files if the round trip network latency of the wide area network (WAN) link is above 80 ms.