Cannot Sign-in with Company Email

I started a new job and was provided an Outlook email through the company. Bought this app in the hopes that I could cut out the middle-man (in this case, a web browser) but unfortunately that’s not the case. When I attempt to sign-in it claims that the email address does not exist. When using the same credentials through the web browser it works just fine. PURCHASED A NON-FUCNTIONING APP! WASTE OF MONEY!

The Man They Call dan about Inbox for Outlook, v1.3.1