To activate a DNSWatchGO trial license for your account: Any account that has no active DNSWatchGO license yet assigned can test it for free for 60 days with a trial license. DNSWatchGO trial licenses have 250 users, are valid for 60 days, and can be extended for an additional 60 days. If you first activate a data retention license that is compatible with a specific Firebox model, it will be added as a new license. If you activate a second license that is compatible with the same Firebox model as an existing license, you can optionally add it as a new license. As described in the table below, the number of devices that can be managed for free with these licenses varies by device model. To manage additional devices, you can purchase an Upgrade Pack license. Any WatchGuard Firebox, XTM, or XTMv customer can use WatchGuard System Manager (WSM) to configure and manage a single device without a WSM license. A WatchGuard System Manager license is required to take advantage of WSM`s centralized management capabilities. WSM licenses are included with the purchase of most Firebox and XTM devices. With a WSM license, you have the following: Threat Detection and Response includes a license in the Firebox function key and licenses for the host sensors that you install on the endpoints. Threat Detection and Response checks the Host Sensor license for expiration at midnight daily.