Outlook 2019 not using modern authentication. Outlook known issues in the June 2017 security updates Last updated: July 11, 2017 The issues documented in this section have been reported after installing the recent updates listed below. Create, share, and govern trusted knowledge with Microsoft SharePoint—powering collaboration, communication, automation, and AI experiences across Microsoft 365. Nov 20, 2024 · This guide walks you through adding Gmail to Outlook, offering clear steps and troubleshooting tips for common errors, so you can keep all your emails organized in one app. Consider update-related POP issues There is a known issue where classic Outlook POP profiles can hang or misbehave after specific Windows 11 updates. Quick troubleshooting steps can sometimes solve Outlook’s password prompt loops, but when deeper authentication settings come into play, a more comprehensive approach is essential to restore seamless email access. 0 (Modern Authentication). That would at least give us an alternative to Outlook which is known to violate the export control regulations due to Exchange Online data caching. Both support modern authentication using POP or IMAP. Oct 11, 2025 · In this comprehensive guide, we explore the intricacies of Modern Authentication, diagnose common problems related to its failure, and provide detailed troubleshooting steps and solutions. Users will need to use Outlook on the web, new Outlook, or a third-party mail client, such as eM Client and Thunderbird. Dec 11, 2025 · Multifactor authentication (also known as MFA, two-factor authentication, or 2FA) requires a second verification method for user sign-ins and improves account security. Feb 8, 2024 · In this article, you will learn how to enable modern authentication in Microsoft 365 for Exchange Online and configure the registry keys for all Outlook clients. 1 day ago · If AOL uses two-factor authentication, ensure the app password is used as the account password, as noted in Change or update email account settings in Outlook for Windows. 10000 do not support Modern Authentication for Outlook. 6 days ago · As of early 2026, Google has completed its transition to OAuth 2. . Once authenticated, Outlook should reconnect to the existing data and resume normal operation. Shop Microsoft 365, Copilot, Teams, Xbox, Windows, Azure, Surface and more. This means that traditional IMAP setups using your standard password—or even some older App Passwords—may no longer trigger the necessary permission window, causing Outlook to "hang" or fail to sync. May 12, 2025 · Disable the Modern Authentication for Office 365 Desktop Apps. The second method to resolve the Outlook authentication problem with the Office 365, is to disable the modern authentication in Windows registry. com. Feb 7, 2025 · Classic Outlook desktop versions older than 11601. Learn how to set up printers, scanners, LOB applications to send email using Microsoft 365 or Office 365. This article contains instructions to set up MFA using the available options: Security defaults: Available in all Microsoft 365 organizations via Microsoft Entra ID Free. Feb 10, 2025 · In this post, we will look at why Outlook prompts for passwords when Modern Authentication is enabled and provide a solution to remediate this issue. In the meantime, please use the workarounds suggested for each issue. Explore Microsoft products and services and support for your home or business. Mar 3, 2026 · Make sure you are using Outlook for Microsoft 365, Outlook 2021, 2019, or 2016, as these versions support modern authentication methods and encryption standards. We're investigating the issues and will update this page when a fix is available. com Sync. Mar 3, 2026 · Sign in using the same account credentials as before and allow modern authentication to complete. Apr 15, 2024 · Today, we are announcing that Exchange Online will permanently remove support for Basic authentication with Client Submission (SMTP AUTH). The next sections walk through exactly how to download, install, and retain Classic Outlook on Windows 11, using methods that align with Microsoft’s current support policies and real-world deployment behavior. Jan 27, 2026 · Work with Google to figure out why Exchange On-Prem mailboxes can't use modern authentication with the Gmail app. Jun 10, 2024 · Option 1: Get a newer Outlook email app which supports Modern Authentication. If your Outlook client does not support Modern Authentication, you will need to upgrade to the latest version and then setup using Outlook. Outlook Anywhere (formerly known as RPC over HTTP) has been deprecated in Exchange Online in favor of MAPI over HTTP. All versions of Outlook for Windows since 2016 have Modern authentication enabled by default, so it's likely that you're already using Modern authentication. The key is knowing how to install it correctly, prevent forced switching, and ensure it remains your default mail client. uiibfhdz zeza zdsxl ewcam exw lale mny uny nmzoxm xbpn