Again, Outlook 2010 does not recognize the MFA and still works with Exchange Online using basic authentication, but all other Office 365 services work fine with Office 365 MFA (both SMS and Authenticator authentication). The only workaround here was to temporarily disable MFA for my user account, create a new Outlook profile (which worked fine without MFA) and re-enable MFA. At the next screen, fill the user's name, email address and password on the corresponding fields and click Next. Since Outlook 2010 does not work with Office 365 MFA, especially not in a hybrid environment (not even with an App Password). Open Outlook and from the Account Settings, launch the New E-mail account setup wizard. This works fine for OWA and Office 365 ProPlus, but not for Outlook 2010. Last week I changed the MFA settings (see previous authenticator app for Office 365 blogpost). Currently, there is no official document indicates whether Outlook 2019 supports connection to Exchange 2010 or not. X-AutoDiscovery-Error: LiveIdBasicAuth:AppPasswordRequired: Īnd further down more details are revealed: Step-by-Step Process to Migrate Exchange 2010 to 2019: Firstly, install and launch the Shoviv Exchange Migration Tool. This indicates that the user may not have logged on for the first time, or the account may be locked. If your users are working on Microsoft Outlook 2010, you need to upgrade your Office to newer version before running migration to Exchange 2019. Mostly this is caused by Autodiscover that goes wrong somewhere, the Remote Connectivity Analyzer shows that Autodiscover to the on-premises Exchange 2010 goes well, but that the redirect to Exchange Online goes wrong and it generates the following error message:Īn HTTP 456 Unauthorized response was received from the remote Unknown server. After a minute the dreaded an encrypted connection to your mail server is not available error message appeared: Remove the Outlook profile but creating a new Outlook profile didn’t work. This morning my Outlook 2010 was working offline, and it didn’t want to go online (OWA and Outlook 365 ProPlus were working fine). And every Monday morning I run the Windows 7 VM for an hour or so to see if everything is working fine □ For testing purposes, I have two VMs, one with Windows 7 and Office 2010 and one with Windows 10 and Office 365 ProPlus. One of my clients is running Exchange 2010 in hybrid mode, and they have Outlook 2010 and Outlook 365 ProPlus client.
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