Forum Discussion
Outlook - Second 365 account-different tenant- fails after both MFA activated
Win 10 1709, Outlook 2016/365 1804(Build 9226.2156)
So, initally I activated MFA on my main account.
My main account went completely fine, it prompted my shortly after doing turning on MFA with a login screen so logged in, then approved via MS Auth app for iphone.
Next, I activated MFA on the second account on the other domain/tenant.
This also went fine, and did the same as the previous account.
That was yesterday.
Today, launch outlook and am presented with an older style username/password box for the second account. I put that in and it errors. First account is still fine.
I remove the second account, thinking I would just have to re-add it. (I had to do this for both on my iphone for some reason)
I go to re-add, File>Account Settings>New
Put the second account e-mail in, it then comes up with the older style box again, then fails with a "Something went wrong" "Something went wrong and Outlook couldn't set up your account" with no specific code
Would that KB article still apply? It's none of the 6 symptoms.
Is Modern authentication (and MAPI/HTTP) enabled in that second account's tenant?
I have asked them and haven't heard back about that. Since I was unable to powershell into them(my other post in a different section of this community site), I couldn't check myself.
I have shut off 2-factor for my account with them in the meantime.
They currently use Dirsync with their on-prem AD and have told me that they all had to use an app password for their Outlook with 2-factor on. I guess that answers that so I will try 2-factor again and use an app password instead.
I suppose they will be able to use modern auth once they get AD Connect and MFA Server going with passthough authentication. But Dirsync was just a more simple sync so I still don't know why modern auth wouldn't work for them, or why it works for roughly the first day, then fails completely - and iphone mail still works modern auth for that tenant. Who knows.
Cecil C. Achord Did you ever find a resolution to this? I too am having a very similar problem once adding enabling MFA on another email address within Outlook from a different Tenant. Once I set it up it initially looked to be working but I noticed a few hours later all of the users that shows their MFA as "Enforced" they could not access their email. I would prompt them for their password but they'd never get logged in. They did report that it was working fine on their cell phones though.
