Non-security updates may still be included in special circumstances or when specifically requested (see next point).

During Extended support, updates mainly focus on security updates.

During Mainstream support, updates can include bug fixes, feature changes and security fixes.

The main differences between Mainstream and Extended support are as follows Microsoft 365 has a separate lifecycle which is explained at the end of this guide but in short This version is always supported. The support end dates are divided between “Mainstream” and “Extended”, for which you’ll find an explanation below the Support End Dates table. With so many newer versions of Outlook, is Microsoft still committed to support my Outlook 2013 version or is it time for me to move on?Įven though newer versions of Outlook and Office came out, Microsoft continues to support the older versions as well for quite some additional years.

Then there is also Microsoft 365 which apparently is always the latest version of Office. I know that since then Outlook 2016 has come out and Outlook 2021 is the latest version that is available. For more information, see Microsoft Lifecycle Policy.I’ve been using Outlook 2013 since it came out and I’m still quite happy with it.

For previous versions of Outlook, only those that have extended support may continue to work with Microsoft 365, although with reduced functionality. Microsoft 365 works with any version of Outlook that is in mainstream support, which includes the latest version of Outlook 2016. Outlook compatibility with Microsoft 365 and your on-premises environment depends on the system requirements for your deployment:

For more information about installing Office updates, see Install Office updates.

To find out what version of Outlook you're using, see What version of Outlook do I have?.

The information in this article doesn't apply to Microsoft 365 Apps.

For example, if you installed a volume licensed version of Outlook, such as Outlook included with Office Professional Plus 2016.

The information in this article only applies to perpetual versions of Outlook that use the Windows Installer (MSI) installation technology.

Latest outlook version for windows