Outlook legacy authentication Since we announced in 2019 that we would be retiring Basic Authentication for legacy protocols we have been encouraging our customers to switch to Modern Authentication. office365. This seems to be our most effective fix, and it’s the one we arrived at after hours of forum digging and web searches. com using POP or IMAP, Modern Authentication is not supported. pastor1855. As you are now aware of Microsoft’s To further get the Office 365 basic authentication report, select the Client app filter and check in all the available legacy authentications like Exchange Active sync, Exchange Online PowerShell, IMAP4, POP3, etc. Copper Contributor. 5. Parameters Hi there, I hope all is well. . As a result, an attacker can access these Use the Get-AuthenticationPolicy cmdlet to view authentication policies in your organization. Legacy Authentication is often referred to as Basic Authentication. Since we announced the In this article. Wait time after change authentication policy. Choose Modern authentication under Services. TL;DR: Basic/Legacy Authentication is a security risk! Admins need to enable Modern authentication. (Azure AD), rather than a dialogue the OS (Windows) or application (Outlook, Thunderbird) itself owns. Modern Authentication can be enabled by setting the DWORD value to 1 in the following registry subkeys: Customers who use Microsoft 365 operated by 21 Vianet need to configure their clients to use pop-legacy. 完成第一因素身份验证后将强制执行条件访问策略。在遇到拒绝服务 (DoS) 攻击等情景中，条件访问不应充当组织的第一道防线，但它可以使用这些事件的信号来确定访问权限。 Details: Summary: Starting February 17, 2025, legacy Exchange Online user identity and callback tokens will be turned off for all Microsoft 365 tenants, affecting Outlook add-ins. Modern authentication in Exchange Online provides you with various ways to increase your organization’s security with features like conditional access and multi Legacy client apps, such as Office 2010 and Office for Mac 2011, do not support modern authentication and can only be used with basic authentication. The first thing you should be aware of is that not all Outlook models can support modern authentication. If you are using PhishAlarm for Exchange or Proofpoint for Outlook, an Office 365 admin from within your company must accept new permissions within Office 365 prior to Microsoft shutting off access to legacy Exchange tokens. Sign in to your Outlook. For information about the parameter sets in the Syntax section below, In Exchange Online, this example specifies whether legacy Exchange tokens for Outlook add-ins are allowed in the organization. Figura 3 – Outlook Legacy Auth. com account. It’s likely that people don’t realize the kind of change that’s coming. Information and fixes from Microsoft have been A February 2025 deadline looms for Outlook classic add-ins that use legacy Exchange tokens for authentication. Nous avons supprimé la possibilité d’utiliser l’authentification de base dans Exchange Online pour Exchange ActiveSync (EAS), POP, IMAP, Remote PowerShell, Exchange Web Services A few weeks back, my colleague Brian Podolsky wrote a blog post article detailing the deprecation of legacy authentication in favor of modern authentication for Exchange Online. We are not responsible for the content on the external site. I have some questions regarding modern authentication over legacy authentication. The legacy authentication doesn’t refer to one particular protocol, but rather any that do not support Multi-Factor Authentication (MFA). “Legacy or Basic authentication refers to older protocols like POP, SMTP, XML-Auth, which don’t allow for rich user interaction, multi-factor authentication challenges, or device verification” It’s important to note that the conversion process we’ll talk about may not result in a full transition to modern authentication, as certain Autodiscover – Used by Outlook and EAS clients to find and connect to mailboxes in Exchange Online; Exchange ActiveSync (EAS) – Used to connect to mailboxes in Exchange Online Azure AD Sign-In Logs – shows sign-ins performed with legacy authentication clients; PowerShell Script. For the correct timeline, see Updates on deprecating legacy Exchange Online tokens for Outlook add-ins. For a sample add-in that uses the SSO token, see Outlook Add-in SSO. The Exchange Team Email-based cyberattacks have only increased with time, so we are requiring modern authentication for all Outlook customers to better help protect their personal accounts. When you enable modern authentication in Exchange Online, Windows-based Outlook clients that support modern authentication (Outlook 2013 or later) use modern authentication to connect to Exchange Online mailboxes. If your Outlook is configured to connect to Outlook. Use AD FS claims-based authentication with Outlook on the web. Deselect all checkboxes under Outlook 2016と Windows 上の Outlook 2019 では、さまざまな OS 条件に基づいて Trident+ または WebView2 が使用されます。 Trident+ または Webview2 を使用する場合の詳細については、「 Office アドインで使用 PhishAlarm Add-in. Microsoft recommends that publishers migrate their Outlook add-ins to use Entra ID tokens through Nested App Authentication (NAA) and Microsoft Graph. Microsoft and Google could be subjected to Class Actions suits if nothing is done to allow legacy products to continue to be used. com or Live. cn / imap-legacy. At this time, we are not including AutoDiscover, another protocol and endpoint used by Outlook. Basic auth is a legacy authentication method that sends usernames and passwords in plain text over the network. Verify your email clients and apps support modern authentication (see the list at the beginning of the topic). Basic Authentication is simply referring to an app, client, or protocol that is only passing a username and password for authentication. This means that all add-ins relying on these tokens must switch to the new Entra ID authentication system to remain functional. Start Registry Editor by using one of the following procedures, as appropriate for your version of Windows: Microsoft recommends that organizations block authentication requests using legacy protocols that don't support multifactor authentication. -legacy" endpoint up. Those clients are: Outlook 2013 or later (Outlook 2013 requires a registry key change) Outlook 2016 for Mac or later. You definitely need to take some action if anyone in your company A quick note to our audience that there is a new blog post related to Nested App Authentication (NAA) and deprecation of legacy tokens for Outlook add-ins, that was published today: Update on nested app authentication and deprecation of Exchange Online legacy tokens. Exchange user identity tokens and callback tokens are deprecated and will be turned off starting February 17th, 2025. Users use Basic Authentication and may be prompted multiple times for credentials. As of February 17 2025, legacy Exchange tokens are blocked by default in all cloud-based organizations. This approach ensures mobile apps using Exchange This change will prevent older Outlook Add-ins and integrations from using legacy authentication mechanisms, requiring organizations to adapt to modern authentication methods. If there is a link that does not work, please email [email protected] and we will attempt to adjust the information with an updated link. Modern Authentication is not supported. Customers that have disabled Basic Authentication have experienced 67 percent fewer compromises than those who still use it. Please go here to read more: New Nested App Authentication for Office Add-ins: Legacy Exchange tokens off by default in October 2024. We recommend moving Outlook add-ins that use legacy Exchange tokens to nested app authentication. Oddly our Outlook client (Office ProPlus) which supported modern Microsoft announced the deprecation of legacy Exchange tokens for M365 starting in February 2025 as part of their Secure Future Initiative (SFI). If you're a developer migrating your Outlook add-in from legacy tokens to Entra ID tokens and nested app authentication, you'll need to test updates to your add-in. Modern Authentication is not enabled by default. I went unnoticed till the recent end of basic auth and Outlook started throwing up the basic login prompt. Microsoft is making this change because basic authentication is a legacy authentication method that sends a username and password with each request. Microsoft's transition process will start October 2024, which will allow admins to opt into using NAA. It has proven ineffective and is not recommended in modern IT environments especially when authentication is exposed to the internet as is Legacy Exchange Online tokens are deprecated, and Outlook add-ins using them will break when deactivated. What is nested app authentication (NAA)? Nested app authentication enables can you guide me if I turn it on Legacy, will there be any issue to the end user, any pop-up to the End Users outlook? A significant update was posted related to Nested App Modern authentication vs. This is the only computer where I'm seeing this odd behavior. ) don’t use SMTP AUTH to send email messages. Based on Microsoft's analysis more than 97 percent of credential stuffing attacks use legacy authentication and more than 99 percent of password spray attacks use legacy authentication protocols. Exit Outlook. Download the free desktop and mobile app to connect all your email accounts, including Gmail, Yahoo, and iCloud, in one place. Once the key is added, and the user restarts Outlook, they receive a legacy authentication dialog box, enter their domain password, and connect to their mailbox without issue. We have received a few support inquiries asking whether yasoon's Outlook add-in (Out The same study found that over 97 percent of credential-stuffing attacks also use legacy authentication. Microsoft has announced that basic authentication for SMTP AUTH will be deprecated in September 2025. View all legacy authentication sign-ins for the user to understand how legacy authentication is being used. The post discusses things like: How to turn off/on legacy tokens for the tenant After we migrated a mailbox and Outlook failed to reconfigure (continuous legacy auth prompts) we could see the failure under Azure AD Sign-Ins. All previous opt-outs and re-entablements of basic authentication are not valid anymore If you want to keep using basic auth in Exchange Online after October 1st, you must explicitly opt-out in September Basic auth is getting disabled for any protocols not opted-out during September, starting October 1st Since basic authentication has been blocked, all applications which use this legacy authentication protocol to access Exchange Online stopped working. There is a full list of protocols further down in this article. This change will impact the Zoom for Outlook add-in's ability to access calendar data effectively. There are two reasons for this. This change will affect users that are using basic authentication and legacy protocols to access their Rose-Hulman email accounts. If EWS has Basic Auth disabled, Outlook won’t use Basic Auth for any of the other protocols or endpoints it needs to access. Office 2019: No, or EnableADAL = 1: Yes: Modern authentication is attempted first. Microsoft has announced the deprecation of Exchange user identity tokens, effective February 17th, 2025. Filters Specifically what I need help with is implementing the changes recommended by Salesforce (see below) in order to allow the Salesforce/Outlook plug-in to continue to work after Microsoft turns off Exchange Online tokens for all tenants as part of the nested app authentication and Outlook legacy tokens deprecation. SharePoint, skype for business) as well as on the client side (outlook , Skype client). This means that when Basic Authentication is fully deprecated, it will no longer connect. On April 9, 2024, Microsoft announced a big change in authentication for Outlook add-ins. Filtering by client apps. Also, Thick all Legacy Authentication Clients; Click on Apply; If your organization is using Outlook 2013, then you will have to enable Modern Authentication manually. has In case of Modern authentication If you disable basic authentication globally, this would effectively kill POP and IMAP since those protocols do not support modern authentication–they rely exclusively on basic/legacy auth. This means the apps and services themselves are not trusted to handle credentials; your (hopefully . com; Customers who use Microsoft 365 operated by 21 Vianet need to configure their clients to use the endpoint. We announced that legacy Exchange user identity tokens and callback tokens will be turned off by default for all Exchange Online tenants as part of Microsoft’s Secure Future Initiative to protect organizations in the We recommend moving Outlook add-ins that use legacy Exchange tokens to nested app authentication. 0. Got a ton of app permission approvals via Azure for 3rd party apps like Apple mail; denied, copy paste above message into reason box with a link to the docs on our intranet. Select a user to see all their legacy authentication sign-ins to the selected app. outlook. I'm thinking the setting didn't get pushed down to the computer a while back when we made the change. Basic authentication. com, MSN. If they use legacy authentication, they are basically using IMAP, POP, SMTP and other older protocols to connect. After changing the authentication policy to allow Modern Auth or block legacy auth: Wait 30 minutes for new policies to be read by front-end servers. Add-ins must migrate to Nested App Authentication (NAA) and Entra ID tokens. Users at our business who work from home, or have external 365 access can work fine, with no problems. Users will get a browser-based pop up asking for UPN and Password or if SSO is setup and they are already logged in to some other services, it should be The following legacy authentication methods have historically been used to access Exchange servers, and it’s the removal of these were are interested in for the purposes of this feature and post. In about 150 days from today, we’re going to start to turn off Basic Auth for specific protocols in Exchange Online for those customers still using it. In other Overview. I have talked with support about this Ce que nous modifions. Forces modern authentication within the Outlook client. Turned off legacy authentication in tenant 10 days later. Outlook 2013. Select a legacy authentication protocol, and then select an application to filter by users accessing that application. Mimecast is actively working with Microsoft to support the new Nested Included documents on removing ActiveSync account from Android and iPhone and installing Outlook app. The users other computer is using Modern Auth so I ruled out his account. A timeline for If your Outlook add-in uses legacy tokens to make calls to Exchange, then this information applies to you. The change removes legacy Exchange authentication methods and replaces On 30 September 2024, the ability to manage authentication methods in the legacy multifactor authentication (MFA) and self-service password reset (SSPR) policies will be retired. Add-ins must switch to nested app authentication (NAA) to have continued access to Exchange mailboxes and other objects. smtp-legacy. Other protocols such as EWS , however, support both basic and modern authentication, but often it does not need to be left enabled at all. First, AutoDiscover doesn’t provide access to user data Microsoft’s end goal is turning off Basic Auth for all customers. These add-ins are being updated to no longer use legacy tokens. Single sign-on access token using nested app authentication Modern authentication is based on the Active Directory Authentication Library (ADAL) and OAuth 2. Outlook 2013 will keep using the basic authentication method by default. com, Hotmail. If there We wanted to make everyone aware of the blog post that went live on the Microsoft Dev blog, talking about new Nested App Authentication for Office Add-ins requirement that is going to be mandatory for Outlook add-ins by October 2024. Perform an IIS reset on all front-end servers. But we can force it to use Modern Authentication by setting a couple of registry keys on the clients. This deprecation impacts Mimecast Essentials for Outlook, specifically when the Enable JSON Web Token Authentication option is enabled within Authentication Profiles. Use the Exchange Online PowerShell cmdlets to turn off legacy tokens in a test Outlook 2010. Good idea to provide compatibility for old devices like XBOX or mobile phones. What is nested app authentication (NAA)? Nested app authentication enables single sign-on (SSO) for Before December 31 2022, you could re-enable the affected protocols if users and apps in your Read the rest of this article to fully understand the changes we made and how these changes might affect you. Modern Authentication, based on OAuth2, In this article, we will walk through the process to identify clients using legacy authentication, then utilize the new functionality available to Exchange Online to disable legacy auth for selected protocols. Nested app authentication enables single sign-on (SSO) for applications nested Create the following registry key to force Outlook to use a newer authentication method for web services, such as EWS and Autodiscover. or. Queste limitazioni hanno portato l’industria informatica a sviluppare nuovi standard di autenticazione che sorpassano i concetti e le limitazioni dell’epoca su cui si basavano i vecchi protocolli e introducono nuove e ricche funzionalità di This article includes links to and includes information from outside resources. Identify impacted add-ins, contact publishers for updates, and consider opting out if necessary. Ensure that you are using newer Outlook clients to connect to Office 365. What Are Legacy Protocols and Basic Authentication? Legacy protocols are processes that use "basic authentication" to connect Finally, follow Block legacy authentication with Microsoft Entra Conditional Access to block legacy authentication for other Exchange protocols on iOS and Android devices; this policy should target only Microsoft 365 or Office 365 Exchange Online cloud app and iOS and Android device platforms. Reply. We recommend that users force Outlook to use Modern Authentication. Learn how to use OAuth authentication to connect with IMAP, POP, or SMTP protocols and to access email data for Office 365 users. What I would do is to slowly disable legacy authentication (conditional access) or to remove the registered app Basic & legacy authentication mechanisms that rely solely on username and password. Legacy authentication refers to applications or protocols which are not supporting modern authentication, like the Microsoft Outlook 2010 or older, IMAP, POP, POP3, and so on. Next, adjust the date filter to Last 1 Month, or whichever period you believe is sufficient. Make sure that there is a check in the box to the left of Turn on Modern Authentication for Outlook 2013 for Windows and later. Basic authentication; Outlook 2013 or later (Outlook 2013 requires a registry key change) Outlook 2016 for Mac or later; Outlook for iOS and Basic auth is a legacy authentication method that sends usernames and passwords in plain text over the network. Note: While selecting the clients, choose all the “Legacy Authentication Clients” except Browser and Mobile Apps & Desktop While this post is quite dev-focused, we wanted to make sure people in the Outlook community working or creating Outlook add-ins see it. If the server refuses a modern authentication For more information, see Enable or disable modern authentication for Outlook in Exchange Online. We are now removing Basic auth from Client Submission. Once Modern Authentication is turned on in Exchange Online, a Modern Authentication supported version of Outlook for Windows will start using Modern Authentication after a restart of Outlook. While OAuth 2. Administrators should update add-ins and consent to new permissions, while developers must revise code and register the updated add-ins in Azure. We’re excited to announce the public preview of Nested App Authentication (NAA). It can take up to 24 hours before all requests from Outlook add-ins for legacy Exchange Online tokens are blocked. 0 or Azure AD App-Only authentication, which provide enhanced security features. You block legacy authentication in Exchange hybrid environments by creating authentication Once Modern Authentication is turned on in Exchange Online, a Modern Authentication supported version of Outlook for Windows will start using Modern Authentication after a restart of Outlook. Users will get a browser-based pop up asking for UPN and Password or if SSO is setup and they are already logged in to some other services, it should be Important: There was an update to the timeline for turning off Exchange online tokens. For more information, see Nested app authentication and Outlook legacy tokens deprecation FAQ. NAA provides simpler authentication and top tier identity protection through APIs Microsoft announced that Exchange Online legacy tokens are deprecated in February 2025. # The two entries below enable modern authentication in Outlook 2013 Set-ItemProperty For a more detailed overview, see the full overview of the SSO authentication method. If customers have SMTP AUTH clients that only support older TLS versions, they need to be configured to use the new endpoint for world wide: smtp-legacy. So I registered new outlook account, set up 2FA and created an app Specifically what I need help with is implementing the changes recommended by Salesforce (see below) in order to allow the Salesforce/Outlook plug-in to continue to work after Microsoft turns off Exchange Online tokens for all tenants as part of the nested app authentication and Outlook legacy tokens deprecation. To ensure a smooth transition, we recommend migrating to modern authentication mechanisms such as OAuth 2. But note that using this endpoint does not mean that you can keep using basic authentication past the deadline when it will be disabled for your tenant. For details on using the SSO token in an Outlook add-in, see Authenticate a user with an single-sign-on token in an Outlook add-in. 0, Azure AD App-Only Authentication, and SharePoint App-Only Authentication are still supported and recommended for use. cn; To use this less secure endpoint Now, click on the Client app filter you added, check every item under the Legacy Authentication Clients section, and click Apply. Legacy Exchange Online tokens are deprecated and will be turned off across Microsoft 365 tenants starting February 17th, 2025. Through its Secure Future Initiative, Microsoft is updating how Outlook add-ins, including the Salesforce Blocking legacy Exchange tokens might cause some Microsoft add-ins to stop working. You can also use an app, such as Outlook mobile, that only uses Modern Authentication and works on both iOS and To disable O365 legacy authentication: Access the Microsoft 365 admin center. This makes it vulnerable to credential theft, phishing, and brute force attacks. cn. To ensure uninterrupted functionality, action is required by the week of January 27, 2025. With legacy authentication If EWS has Basic Auth disabled, Outlook won’t use Basic Auth for any of the other protocols or endpoints it needs to access. This decision is part of a broader move to enhance security by transitioning away from legacy authentication methods, which are considered less secure compared to modern alternatives like OAuth 2. In the left navigation pane, expand Settings and click Org settings. On April 9, 2024 the Office Platform Team made two major announcements: We launched the public preview of Nested App Authentication (NAA), which provides simple authentication and top tier identity protection through APIs designed When you disable legacy authentication for users in Exchange, their email clients and apps must support modern authentication. ". Dear Valued Customer, Microsoft is deprecating Outlook legacy tokens with their introduction of a new authentication protocol, Nested App Authentication (NAA). Microsoft announced that effective October 1, 2022, they will begin disabling Basic authentication in all tenants for Outlook, EWS, RPS, POP, IMAP, and EAS protocols in Exchange Online. Set-AuthenticationPolicy Update: The full timeline for retirement of Basic Authentication in Exchange Online is now published in Basic Authentication Deprecation in Exchange Online – September 2022 Update. Virtually all modern email clients that connect to Exchange Online mailboxes in Office 365 or Microsoft 365 (for example, Outlook, Outlook on the web, iOS Mail, Outlook for iOS and Android, etc. partner. 注意. While Outlook 2016 and 2019 support modern authentication by default and thus do not require any further action to use these new flows, Outlook models that support legacy authentication such as Microsoft Online Sign-In Assistant or basic Legacy authentication is also known as “basic authentication. ygxll vycv qmsyuo ohka dskps fqoo rfha okwyw fyx lsjt iqvm oxjavg kyff snhdc ldyoqsmr