
So something changed in Windows 10 / Outlook 2016 to impact this. Then sign in to Office for Mac 2016 and activate it. I rebuilt the same machine in September 2016 and had no problem with this same setup. Hi Janet, Have you activated Office If you still need support, here is a suggestion: If you have a product key of Office, we suggest you open follow this article to link the product key to your account: Where to enter your Office product key. The result: I can't use Outlook 2016 for my Office 365 email. The behavior is that because I'm using the same email, Outlook now assumes it's an MSA account and refuses to use the domain with the autodiscovery DNS entry for my domain to resolve to O365 Exchange servers to lookup the account. except it autofills my email as matter if I use my Office 365 (Azure AD) password with what's provided or if I remove "MicrosoftAccount\" from the email address, Outlook refuses to connect to it. Instead, it re-prompts me to enter the credentials. When I try to add my Office 365 account to Outlook, it constantly rejects the credentials I enter. When I try to add another account in Windows 10 for Exchange using the same email, it tells me that email is already in use.
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I login to Windows 10 with my MSA account. Within Windows 10 => Settings => Accounts, I see my MSA account listed as "Outlook" and can firm it's using a Hotmail server to sync. Outlook 2016 latest (installed from Office 365.I have an Office 365 account with the email I have an old MSA account with the email Windows 10 - Creators Update (but tried this with a fully patched version immediately before updating to Creators Update.
