We have created a set of custom model driven apps to fit the different roles of the users of our customer. Most of the users will have access to a minimum of 2 apps and we need to set one of the as the default app for the user. How do we achieve this? We have tried to set Preferences in home.dynamics.com, however, this option is not available for the users. Is there any other way to set one specific app as default for each user? It is ok for the user to do this themselves, we just need the guide on how to proceed.