I think app is dead – Inbox Pro, for Outlook Review

I have been using this app for about 4 years now and suddenly cannot log in. I have tried deleting, reinstalling. I know I have the right server info because I can log into webmail from browser. Too bad, This was a decent enough app. Now looking for another solution. I have iPhone 5s, ios 8.1.2.
Review by pokie1313 on Inbox Pro, for Outlook.