Searched till my fingers bled; gave up and installed the free "Windows Outlook", but it was a mess that online Outlook email repair utility I can't take. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Windows 10 will reach EOS (end of support) on October 14, 2025.

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Some users on macOS 10.14 have experienced issues logging back into Mac Mail after Modern Auth is applied to their accounts. Specifically, after successfully responding to the Duo prompt, the pop-up window will remain blank except for a spinning icon and never finish adding the account to the application. This issue has been resolved by having users connect to the UO VPN when initially setting up their account with Mac Mail. After logging in successfully once while connected to the VPN, any removing or re-adding of FixTechGuide support for Office 365 the account again to Mac Mail should not need the VPN. In many cases, simply removing the account from the application and re-adding the account using the standard Sign In method will resolve any issues being experienced when Modern Authentication is first turned on for an account.

Troubleshoot sign-in issues with Office modern authentication when you use AD FS

Modern authentication (ADAL) with AD FS requires the /adfs/services/trust/13/windowstransport endpoint to be enabled. But primarily I am guessing you are changing the server name. This does not enable any oauth list entry that may be available for that server. Then the entry will be in the list for you to select. I have no issues in Outlook 365 with being a global admin and having modern authentication with multi-factor authentication.

Gmail

• If the error you are encountering is not listed, please create a ticket on our Email and Calendar Help page for assistance.
• To resolve this issue, set up AD FS to use forms-based authentication as the secondary form of authentication.
• Additionally, accessing email through a web client will continue to work, even if an application is having issues.
• App password is not needed so long as you’re using a modem version of Outlook.
• Outlook 2013 supports MA but requires a registry entry as already mentioned.
• If it continues to be problematic, you may need to either a.) Remove any related credentials from the users credential manager in Control Panel, it b.) Create a new outlook profile.
• I have confirmed that on two different PCs that are accessing the same mailbox with the same version of Outlook, which is the latest version from Microsoft included within my Office 365 package.

This is due to Modern Authentication's ability to support multi-factor authentication (such as Duo), which is better for information security. When this change goes into effect, any email application that uses Basic Authentication may not work properly. This article contains information about how to troubleshoot problems that affect the ability to sign in to Microsoft Office 2016 apps and Microsoft Office 2013 apps that are enabled for modern authentication. This article also contains resources for IT administrators to address reports about Active Directory Federation Services (AD FS) issues that are specific to Office for Windows platforms. (a) I hadn't previously set up 2FA on my Microsoft account, and it seemed to require this.

iOS Mail

Removing and re-adding the account using the standard Sign In method will resolve this error. My concern is that MS will force modern authentication soon, and switch off basic authentication. I therefore have a workaround, but not a solution. Is there some kind of setting within O365 that’s forcing Outlook to use basic authentication ? Other apps are using modern authentication perfectly well, including Teams. I authorise the applications after installation with modern authentication, and OneDrive client uses it oo, so it looks like it’s only Outlook that’s forcing basic authentication.





I’m going to try & switch modern authentication off to see if that is resolve Outlook not sending emails fast the issue, although there doesn’t seem to be any way of doing this. It does look llike a one-time thing to switch it on. I’m quite fortunate that this is just my O365 instance, so customers not being impacted. Desktop SSO is the process that's used to obtain seamless sign-in to Microsoft 365 resources through AD FS from a domain-joined computer that's inside a company network. When desktop SSO fails, users may be unable to activate Microsoft 365 Apps for enterprise or users may be prompted for forms-based logon even though they are using domain joined-computers from inside the company network.

Outlook 365 Won't Prompt for Modern Authentication

(c) Hotmail syncs with my iPhone, and this stopped working; however, I simply had to re-enter my usual Hotmail password on the phone to get it working again. Similar to Mac Mail, UO email accounts set up in iOS Mail application prior to the Modern Auth update will continue to work provided the device is running iOS 11 or newer. Outlook 2013 supports MA but requires a registry entry as already mentioned. App password is not needed so long as you’re using a modem version of Outlook. To resolve this issue, set up AD FS to use forms-based authentication as the secondary form of authentication. To do this, follow the appropriate steps for the version that you use.