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Submitted URL: https://techcommunity.microsoft.com/t5/microsoft-365-blog/new-minimum-outlook-for-windowsversion-requirements-for/ba-p/2684142
Effective URL: https://techcommunity.microsoft.com/t5/microsoft-365-blog/new-minimum-outlook-for-windows-version-requirements-for/ba-p/2684142
Submission: On March 08 via api from US — Scanned from DE
Effective URL: https://techcommunity.microsoft.com/t5/microsoft-365-blog/new-minimum-outlook-for-windows-version-requirements-for/ba-p/2684142
Submission: On March 08 via api from US — Scanned from DE
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VIDEO HUB Azure Exchange Microsoft 365 Microsoft 365 Business Microsoft 365 Enterprise Microsoft Edge Microsoft Outlook Microsoft Teams Security SharePoint Windows Browse All Community Hubs Blogs Blogs Events Events * Events Home * Microsoft Ignite * Microsoft Build * Community Events Microsoft Learn Microsoft Learn * Home * Community * Blog * Azure * Dynamics 365 * Microsoft 365 * Security, Compliance & Identity * Power Platform * Github * Teams * .NET Lounge Lounge * 802K Members * 8,300 Online * 2.2M Discussions Search Enter a search word Turn off suggestions Enter a search word Turn off suggestions Enter a user name or rank Turn off suggestions Enter a search word Turn off suggestions cancel Turn on suggestions Showing results for Show only | Search instead for Did you mean: Sign In Sign In Enter a search word Turn off suggestions Enter a search word Turn off suggestions Enter a user name or rank Turn off suggestions Enter a search word Turn off suggestions cancel Turn on suggestions Showing results for Show only | Search instead for Did you mean: * Home * Microsoft 365 * Microsoft 365 Blog * New minimum Outlook for Windows version requirements for Microsoft 365 * Back to Blog * Newer Article * Older Article NEW MINIMUM OUTLOOK FOR WINDOWS VERSION REQUIREMENTS FOR MICROSOFT 365 * Subscribe to RSS Feed * * Mark as New * Mark as Read * * Bookmark * Subscribe * * Email to a Friend * * Printer Friendly Page * Report Inappropriate Content By Microsoft 365 Published Aug 27 2021 09:00 AM 106K Views Skip to footer content Microsoft_365_Team Microsoft Aug 27 2021 09:00 AM NEW MINIMUM OUTLOOK FOR WINDOWS VERSION REQUIREMENTS FOR MICROSOFT 365 Aug 27 2021 09:00 AM *Updates added on 11/4/2021 **Updates added on 1/12/2022 ***Updates added on 3/1/2022 We are quickly approaching the November 1st deadline when the minimum version requirements for connecting Outlook for Windows to Office 365/Microsoft 365 services will change. So, we thought we’d share more information on why we’re doing that. After November 1, 2021, only Outlook 2013 Service Pack 1 (with latest fixes) and later will be able to connect to Microsoft 365 services. It’s worth noting here that Outlook 2007, 2010, and Office 2013 versions earlier than 15.0.4971.1000 *and Office 2016 versions earlier than 16.0.4600.1000 aren’t supported now, but we know some customers just can’t quit them. CURRENT STATUS Since our Message Center post last fall, we’ve seen a drop in the usage of the unsupported versions of Outlook for Windows – great job! If you’re still running older versions, please start working on a plan to move by November 1st. Our Customer Support team is actively reaching out to tenants that have the most usage on Outlook 2007 and 2010 to help them meet the deadline. If you have questions or concerns about getting all users off these unsupported builds, please reach out to your support teams. *As announced, the block will start rolling out on November 1st for users on Outlook 2007 and will proceed in a phased rollout. **The block has started rolling out for Outlook 2010 users on January 11, 2022 and will proceed in a phased rollout. ***The block has started rolling out for Outlook 2013 users on February 28, 2022 and will proceed in a phased rollout. **USER EXPERIENCE IN OUTLOOK Outlook users will see the following error message in Outlook, when they experience the block that we are rolling out: “Your Microsoft Exchange administrator has blocked the version of Outlook that you are using. Contact your administrator for assistance.” Please note that once Outlook 2007 or Outlook 2010 is blocked from connecting to Exchange Online, we are unable to restore the ability to connect. Users can immediately start using Outlook on the web through a browser on their Windows (or any other) device. Outlook on the web connects to Exchange Online and allows the user to interact with their email, contacts, calendar, groups, public folders and tasks. In order to connect to Exchange Online using Outlook for Windows, the device must be upgraded to a supported version of Outlook for Windows as outlined below. Customers can also immediately obtain a free 1-month trial of Microsoft 365 Apps for business, which includes the Outlook desktop client to use with their existing Exchange Online subscription. Outlook for iOS and Android and Outlook for Mac are other recommended options on mobile devices to connect to Exchange Online and utilize the feature-set offered in our service for mobile users. ***Outlook 2013 users should see the following error when attempting to connect to a mailbox in Exchange Online using an opt-out of support build of Outlook 2013 after the block is enabled: WHY ARE WE BLOCKING OLD VERSIONS? Older versions of Outlook, such as Outlook 2007 and 2010 are incompatible with the following upcoming service changes, which is prompting this controlled block: * Support for basic authentication is ending to increase the security of Microsoft 365 by relying on modern authentication protocols, which are not only more secure, but also provide compliance and policy controls to help you manage your data. * We’re working on adding support for HTTP/2 in Microsoft 365. HTTP/2 is a full duplex protocol, which decreases latency through header compression and request multiplexing. On the service side, we’ll be able to better prioritize requests and more effectively push data to clients. It can be a challenge to stay current, but there are many reasons why staying current is a good idea: * Security fixes will protect your devices against known vulnerabilities. * Reliability – over the last five years we’ve eliminated 75% of crashes in Outlook! * Updated versions have all the coolest new features to make your life easier! *REPORTING For tenant admins who would like to know what versions of Outlook are active in their tenant, the Email apps usage report provides a full list of all users and Outlook versions in use within a tenant organization. For more information, see Microsoft 365 Reports in the admin center - Email apps usage. UPGRADE GUIDANCE * For Office 2007 and 2010, use the roadmaps listed below to move to Microsoft 365 Apps. If your organization is highly regulated or uses devices that can’t take updates, consider Office 2019 * For Office 2013, move to Version 15.0.4971.1000 of Office 2013 (Service Pack 1 with the October 2017 Update) * For Office 2016, move to Version 16.0.4600.1000 of Office 2016 (With the November 2017 Update, KB 4051890) * Office 2007 end of support roadmap * Office 2010 end of support roadmap * Deployment guide for Microsoft 365 Apps Continue the conversation by joining us in the Microsoft 365 Tech Community! Whether you have product questions or just want to stay informed with the latest updates on new releases, tools, and blogs, Microsoft 365 Tech Community is your go-to resource to stay connected! 5 Likes Like 25 Comments net-1994 New Contributor Sep 10 2021 08:31 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 10 2021 08:31 AM Hello - It was mentioned (here: https://docs.microsoft.com/en-us/deployoffice/endofsupport/microsoft-365-services-connectivity )that Visio and Project are also affected by this change. How?What versions of those are affected? For MSI and click to run versions? Our more recent installs of Visio and Project are baked into the O365 office suite. But we do have older versions (e.g. project 2010/13) of these two apps that used the MSI based installer. 1 Like Like AJohnstone765 Regular Visitor Sep 14 2021 06:43 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 14 2021 06:43 AM Will any other applications or devices (i.e. Android or iOS mobile devices running built-in mail apps) be affected by this? Or is the impact really only targeted somehow to old Outlook versions? If so, how is that being accomplished? By UserAgent string or something similar? 1 Like Like Microsoft_365_Team Microsoft Sep 16 2021 04:50 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 16 2021 04:50 PM @net-1994, thanks for your question! The article you referenced has been updated to clarify which versions are supported for connecting to Microsoft 365 (and Office 365) services. The section titled, "Additional information about connectivity to Microsoft 365 services" states: * The following versions of Project are supported for connecting to Microsoft 365 (and Office 365) services: * Project Online Desktop Client * Project Professional 2021 and Project Standard 2021 * Project Professional 2019 and Project Standard 2019 * Project Professional 2016 and Project Standard 2016 * The following versions of Visio are supported for connecting to Microsoft 365 (and Office 365) services: * Visio desktop app that comes with a Visio Plan 2 subscription * Visio LTSC Professional 2021 and Visio LTSC Standard 2021 * Visio Professional 2019 and Visio Standard 2019 * Visio Professional 2016 and Visio Standard 2016 - Microsoft 365 Team 1 Like Like net-1994 New Contributor Sep 16 2021 05:49 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 16 2021 05:49 PM Thanks for the extra information. What about Visio or Project 2010 or 2013 versions? I don't think they connect or use any O365 services, but I could be wrong.... 1 Like Like Microsoft_365_Team Microsoft Sep 20 2021 03:30 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 20 2021 03:30 PM @AJohnstone765, Thanks for your question. The block will only affect Outlook. When Outlook communicates to the server it says, "I am Outlook and I am build XX.X.XXXXX.XXXXX," and the server can then check if the user is using an appropriate build. - Microsoft 365 Team 2 Likes Like Balance58 Regular Visitor Sep 22 2021 12:10 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 22 2021 12:10 PM In the post Basic Authentication and Exchange Online – February 2021 Update by the Exchange Team back in Feb 2021 Microsoft announced among other things that, "The first change is that until further notice, we will not be disabling Basic Auth for any protocols that your tenant is using. When we resume this program, we will provide a minimum of twelve months notice before we block the use of Basic Auth on any protocol being used in your tenant." Is the content of that post still accurate? Thanks. 1 Like Like Meenah_Khosraw_IS Community Manager Sep 22 2021 01:18 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 22 2021 01:18 PM @Balance58, As your question is regarding a separate blog post that you referenced, which was posted in the Exchange community and written by the Exchange team, it is recommended that you post your question on that blog article's comment thread to ensure you get an accurate response from the Exchange team. Thanks, Meenah Community Manager 1 Like Like Balance58 Regular Visitor Sep 22 2021 01:39 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 22 2021 01:39 PM Meenah, thanks for your reply. You referenced the exact same post in the first bullet under "Why are we blocking old versions?" Given that, wouldn't my question be fair game for this thread? Thanks. 1 Like Like Microsoft_365_Team Microsoft Sep 22 2021 02:07 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 22 2021 02:07 PM @Balance58, The Exchange team published an updated blog article in June regarding Basic Auth and Exchange Online: Basic Authentication and Exchange Online – June 2021 Update - Microsoft Tech Community. In it The Exchange Team stated, "As we’ve said before, we’re only currently planning to turn off Basic Auth for those customers who are not using it. For customers that use still Basic for some or all the affected protocols*, we are not touching authentication settings for those protocols (for the time being)...We have been busy analyzing Basic Auth usage data for our customers and now have a solid understanding of who uses it and who does not. And we’re going to start turning it off for those who are not using it. The process is: We’ll randomly select customers with no usage in any, or all affected protocols, send them a Message Center post informing them that in 30 days we’re going to turn off Basic Auth. 30 days later, we’ll turn it off and send another Message Center post to confirm it was done." For additional information regarding this update, please reference the blog post linked above. - Microsoft 365 Team 1 Like Like Balance58 Regular Visitor Sep 22 2021 02:27 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 22 2021 02:27 PM That is very helpful. Thank you. Just to be crystal clear (and sorry for not asking this sooner): Does that mean that users who are currently using Outlook 2010 or prior will continue to be able to connect past November 1? 2 Likes Like AJohnstone765 Regular Visitor Sep 22 2021 02:34 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 22 2021 02:34 PM @Balance58, I'm not a MS employee, so take this with a grain of salt, but i think the answer is 'no'. Old Outlook versions will be specifically prevented from connecting starting 11/1. See the question i asked earlier that a MS employee answered. They're going to use a UserAgent string (or equivalent) to detect and block those older versions. So they're not really disabling an authentication method this round. Just specific client versions. 1 Like Like Balance58 Regular Visitor Sep 22 2021 03:36 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 22 2021 03:36 PM @AJohnstone765, thanks for your response. It would not surprise me at all if you are correct but I hope MS will respond with a definitive confirmation that this is really, really going into effect on November 1, or not. LOTS of users are still running older versions, in many cases for compatibility with other (really old) applications. I'm not making excuses for their deferred maintenance, but the change will not just be a matter of upgrading Office for those users and November 1 is soon. 2 Likes Like ExchangeOnline Frequent Visitor Sep 26 2021 12:05 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 26 2021 12:05 AM @Microsoft_365_Team please add support for modern authentication in Outlook with POP/IMAP. Now this is not available, but this functionality is very much needed! 1 Like Like Reza_Ameri Trusted Contributor Sep 26 2021 10:38 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Sep 26 2021 10:38 AM I should share that several organizations have been working on migrating to the latest version of Microsoft Office. However, due to the COVID-19 and financial situation, they forced to stay we older version. I request Microsoft extend support for older version of Microsoft Office and give more time for recovery from the COVID-19, so companies would have resources for upgrade. 2 Likes Like mprentice Senior Member Oct 05 2021 06:37 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Oct 05 2021 06:37 AM Anyone know of a programmatic way to determine if there are still old, soon to be unsupported Outlook clients, within the tenant? The report through the web admin portal, and the Graph API, do not appear to report actual version numbers just "Outlook 2013" and "Outlook 2016", etc. I get that the goal should be to get rid of all the old software but limiting our ability to report on data MS does have (each client reports back what version is being used) doesn't help the situation. 1 Like Like InterLinked1 Occasional Visitor Oct 23 2021 05:12 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Oct 23 2021 05:12 PM This is why we run Exchange on prem and don't settle for this Exchange Online nonsense... Microsoft can pull the plug on you whenever it feels like it, leaving you with no recourse. We'll decide if basic auth is allowed or not, that's not for Microsoft to dictate to us, thank you very much. 0 Likes Like Balance58 Regular Visitor Oct 25 2021 11:06 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Oct 25 2021 11:06 AM 1 week to go. Microsoft Team, can you confirm that "After November 1, 2021, only Outlook 2013 Service Pack 1 (with latest fixes) and later will be able to connect to Microsoft 365 services" will be enforced? Thanks. 0 Likes Like ZenVegas Regular Visitor Oct 26 2021 12:22 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Oct 26 2021 12:22 PM @mprentice , check out this Microsoft doc for information on finding legacy authentication apps - https://docs.microsoft.com/en-us/azure/active-directory/fundamentals/concept-fundamentals-block-lega... It is still rudimentary but provides some good information. Regards 0 Likes Like cheetos Occasional Visitor Oct 28 2021 11:43 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Oct 28 2021 11:43 AM I'm trying to understand whether or not this will impact migrations from Exchange 2010 to Exchange Online (O365). Will we need to migrate to Exchange 2013+ and then onboard users to O365 EO from there? 0 Likes Like mprentice Senior Member Oct 28 2021 11:53 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Oct 28 2021 11:53 AM @cheetos As long as the users are running new enough Outlook then it won't impact the migration from Exch 2010 to ExchOnline. If the users are still running Outlook 2013 or old Outlook 2016, then they will be affected. This is a client workstation issue, not a server issue. 1 Like Like cheetos Occasional Visitor Oct 28 2021 11:58 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Oct 28 2021 11:58 AM @mprentice Excellent. Thanks for the clarification. I was not able to find anything on the server side either, so figured I'd check in to see if others had sourced information. 0 Likes Like doshea Occasional Visitor Feb 03 2022 05:13 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Feb 03 2022 05:13 PM Microsoft, again being arbitrary and capricious. In this case, I am an Exchange-only customer. I have no interest in Microsoft TELLING ME what clients they will allow to connect to their exchange server, and that to use their precious Exchange hosting product, I have to update all my clients, at massive cost. Easier to just move onto an alternative hosting service, one that will likely be willing to support my Office 2010 clients forever, FOREVER, until the end of time. I don't care that Office 2010 is "not supported", hell Microsoft does NOT support stuff when it is "supported. And in this case, the notifications DID NOT HAPPEN. I woke up, had my service renew (3 days ago), and today, after paying for it, it no longer works because Microsoft decided that they want more money for clients. NOT FOR ANY OTHER REASON!!!!! All other excuses from Microsoft are just that, excuses. Now, actively looking for a new Exchange Server hosting service. Microsoft Online (Azure) completely has lost its way. 1 Like Like JZapata_SwO Regular Visitor Feb 24 2022 11:21 AM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Feb 24 2022 11:21 AM Hi, please include in this article the required Windows OS versions. Some customers still use Windows 7/8 in combination with Office2kX. They consider being supported by this. You have to have both, Office and Windows OS versions supported. 0 Likes Like ScottLumos Occasional Visitor Feb 24 2022 06:22 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Feb 24 2022 06:22 PM Does anyone know if this blocking will affect Outlook for companies that have a self-hosted Exchange Server? 0 Likes Like StevenTater Occasional Visitor Mar 02 2022 05:26 PM * Mark as Read * Mark as New * * Bookmark * * Permalink * Print * Email to a Friend * * Report Inappropriate Content Mar 02 2022 05:26 PM Office 2013 versions earlier than 15.0.4971.1000 We have a slightly newer version 15.0.5059.1000 and it doesn't work. What do we need to do to make this version work again? 0 Likes Like You must be a registered user to add a comment. If you've already registered, sign in. 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