At work, we made the switch from a local mail server that was accessed over POP3 and IMAP to Office365 Outlook which we access through their RESTful API. To learn more about how this works, I tried to duplicate this process so I can access my personal Outlook emails via a console application.
For a client, I’m working on a portal for their customers. This portal needs to be branded according to the logged-on client. If Microsoft does business with my client and can log into the portal, then the Microsoft logo should appear and all highlight colours should be red, green, blue and yellow.