When you enable the Group Management add-on, groups can be created to provide access to different features of the app. Enabling the add-on also allows you to send push notifications to specific groups. However, BiznessApps does not currently have the capability to add the same user to more than one group. This article provides information about adding users into different groups and how to overcome the limitation mentioned earlier.
Currently, the system does not allow assigning single users to multiple groups. You need to create new groups to cater to these users and overcome this limitation.
You can then assign the required features that are available to the newly-created group and use the same group when sending push notifications. For more information, please check the Step 2 - Targeted Audience section in the Sending Push Notifications article.
To send push notifications to multiple users, please review the Multi-User Push Notifications section in the Sending Single and Multi-User Push Notifications article.