Universal Containers (UC) currently uses Salesforce Sales Cloud and an external billing application.

Salesforce Canvas is a tool that allows external applications to be embedded into Salesforce as iframes, which can provide a seamless user experience. App Launcher is a feature that allows users to access connected apps from a single location in Salesforce. To enable single sign-on anduse Salesforce as the identity provider, the external billing application needs to be configured as a connected app and use an OAuth 2.0 or SAML protocol. Identity Connect is not relevant for this scenario, as it is a tool for synchronizing user data between Salesforce and Active Directory. References: Salesforce Canvas Developer Guide, App Launcher, Connected Apps