EPOS 14.2.0 doesn't seem to honor the ability to disable dashboard via config file

We were told to create a config file called "dashboard_config.json" in the C:\Program Files\IceWarp\html\webmail 

Contents of said file are:  {“dashboard_enabled”: false}

This doesn't seem to be honored in 14.2.1.  We have our mail server in a sandbox environment right now with no internet access, webmail users cannot login, sits at "authenticating dashboard".

Server is running 14.2.1