This is an article that describes how to register an application in Azure Active Directory. It also has information related to settings for Client/Application ID and redirect URI required for settinsg in Customer Verbatim.
This is an article that describes how to create a Personal View (User Query). A Personal View of the entity you want to analyse needs to be created for Customer Verbatim to select and filter the data set from Dynamics 365.
This article explains some suggested settings for connecting Customer Verbatim to your organization for on-premise and online.