14 DAY TRIAL // Microsoft announced a series of changes for Outlook for Windows to access Microsoft 365, explaining that starting with November 1, only Outlook 2013 Service Pack 1 and newer would be supported.
More specifically, if you’re using older versions of Outlook, such as 2007 and 2010, will no longer be able to connect to Microsoft 365, with the Redmond-based software giant explaining that its support team is working with tenants to make sure they’re reaching the upgrade deadline.
“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 aren’t supported now, but we know some customers just can’t quit them,” Microsoft explains in an announcement.
The migration working according to the plan
The good news is that most customers have already moved to newer versions of Outlook or are in the process of doing it, according to the Redmond-based software giant.
“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,” it says.
In case you’re wondering why you need to upgrade and older versions of Outlook are no longer supported, Microsoft says it’s giving up on basic authentication systems, while also working on adding HTTP/2 in Microsoft 365, something only supported in the latest clients.