The notifications work well and can be displayed on the lock screen of your device. Viber knows how to take advantage of the features of Windows 10 on the level of notifications, dynamic icons and the Dock function. Unfortunately, this version of Viber doesn't support group calls, so you need to do these one by one.
In text chat, Viber lets you create chat groups of up to 40 contacts. Viber for Windows 10 allows you to chat and make voice calls (no video) with your contacts, as well as send funny stickers and smileys, incorporated into the latest versions for mobile phones. This way you'll be able to see all your friends who use Viber and be able to start communicating with them. At that time, Viber imports your Viber contact list and integrates them into the application.