Forum Discussion

MVP

Apr 19, 2017

Can't connect Outlook 2016 to my O365 Mailbox

Scenario: I have an Office 365 account with the email foo@contoso.com I have an old MSA account with the email foo@contoso.com Windows 10 - Creators Update (but tried this with a fully patched ve...

exchange

office 365

VasilMichev

MVP

Apr 19, 2017

Probably something new with the Creators update. I havent updated to it yet, so I cannot test to see if I can reproduce. In any case, I'd advise removing the alias from your MSA, there are all kinds of other issues you will run into. Microsoft has finally decided to pull the plug on this type of configuration, in case you missed it: https://blogs.technet.microsoft.com/enterprisemobility/2016/09/15/cleaning-up-the-azure-ad-and-microsoft-account-overlap/

Andrew Connell

MVP

Apr 19, 2017

No... I tried this same setup prior to updating to the Creators Update as I said at the start of the post.

While I know and agree the setup I have is no longer allowed, it is still supported and I have never had an issue with it. Until it's required you move away from it, I'm not removing the alias as I have a ton of things that use that MSA account. I'm not removing it to fix this one issue that I expect will create countless others.... not all groups @ Microsoft are ready to deal with that.

PeterWhitehouse
Iron Contributor
Apr 30, 2017
Try changing the autofilled email from "MicrosoftAccount\foo@contoso.com" to "contoso.com\foo@contoso.com" and see if that works.
- Andrew Connell
  MVP
  Apr 30, 2017
  Unfortunately not... I did try that when it first happened.
  - Salvatore Biscari
    Silver Contributor
    Apr 30, 2017
    I had the same problem. It is due to having the same username for O365 and MSA.
    My advice is to change the username for the MSA: I have had no problems anymore.
    It is actually very simple: see https://www.howtogeek.com/277170/how-to-change-the-primary-email-address-for-your-microsoft-account/
    Hope it helps...