Outlook accounts not showing in the Accounts setting page
I had this happen and it was driving me nuts. I did finally solve it by deleting the Exchange account from the Outlook app, going to the Accounts menu and hitting Add Account, adding the Exchange Activesync account. THEN, go back to Outlook and add the account again. Outlook walked me through the entire process of adding the account, even though it theoretically existed. Having essentially added the same account both ways, though, it now shows up in the Accounts page and works in the Outlook app.