You can access the sync option by visiting Settings -> Configuration -> Device Templates -> Sync Templates.
This will fetch and sync all new device templates from the shared repository of OpManager. You can also enable the auto sync option. This enables you to fetch new device templates from the shared repository constant intervals. You can enable auto sync by visiting Settings -> System Settings.
OpManager also gives you a pop-up option to auto sync the device device templates in the inventory page. You can also see the 'sync and rediscover' option when you drill down to the device snapshot page (Navigate to Inventory and click on a device to open the device snapshot page.) that allows you to rediscover the device which was previously unavailable due to the missing device template.
