Is there a way to automatically assign users to groups in App Management?
Yes, the way to do this is to integrate App Management with your existing SSO provider. For help getting this setup, please open a support ticket.
Once this integration is complete, you will want to set up either group matching or group auto-provisioning: Please see https://help.apperian.com/display/pub/Group+Assignment+During+SSO
The AD groups are considered the master groups and will replace any groups that have been assigned to a particular user by the Apperian portal.