Changes to the ACLs here only affect the behavior of the system, if you deploy the ACL data afterwards. By deploying the ACL data, the newly made changes will be written to the configuration.
Here you can upload a configuration file to import a calendar to your system. The file needs to be in .yml format as exported by calendar management module.
To enable data sending, please register your system with OTRS Group or update your system registration information (make sure to activate the 'send support data' option.)