Office 365 and supported Office versions

Which Office version are supported with Office 365/Microsoft 365 ?

Many web pages, including Microsoft support pages, tell us that support for Office 2016 with Office 365 ends on October 13, 2020. These same sites also indicate that it will simply be impossible to connect to Office 365 services with an Office 2013 version… all of this information dates from 2017 and Microsoft has since backed down.

Currently (August 2020), the minimum Office versions are indicated in the following table.

Note : These minimum builds are mainly related to the compatibility with MAPI over HTTP for Outlook:

Office versionUpdate requiredBuild minimum
Microsoft 365 Apps (Office 365 Business/ProPlus)The build must not be older than 18 months
Office 2016/2019Update december 2015MSI : 16.0.4312.1001
Subscription : 16.0.6568.20xx
Office 2013Office 2013 Service Pack 1 (SP1) + Update december 2015 https://support.microsoft.com/en-us/help/3121650/december-8,-2015,-update-for-office15.0.4779.1002
Office 2010Office 2010 Service Pack 2 (SP2)+ Update december 2015 https://support.microsoft.com/en-us/help/3121650/december-8,-2015,-update-for-office14.0.7164.5002
Office 2007Outlook 2007 does not support MAPI over HTTP so it doesn’t work

Microsoft has changed its position by pushing the support of Office 2016 with Office 365 until 2023:

Office 2016 connectivity support for Office 365 services

In addition, we are modifying the Office 365 services system requirements related to service connectivity. In February, we announced that starting October 13, 2020, customers will need Office 365 ProPlus or Office 2019 clients in mainstream support to connect to Office 365 services. To give you more time to transition fully to the cloud, we are now modifying that policy and will continue to support Office 2016 connections with the Office 365 services through October 2023″

https://www.microsoft.com/en-us/microsoft-365/blog/2018/09/06/helping-customers-shift-to-a-modern-desktop/

What does end of support mean?

Office, like almost all Microsoft products, has a support lifecycle during which we provide bug fixes and security fixes. When an Office version reaches its end of support, for example in October 13, 2020 for Office 2010 and Office 2013, Microsoft will no longer provide the following:

  • Technical support for issues
  • Bug fixes for issues that are discovered
  • Security fixes for vulnerabilities that are discovered

Microsoft support site clearly states that connections from older versions (2013 and 2010 ) will not be blocked even in october 2020 (end of support 2020).

BUT be careful because Microsoft will block basic authentication in 2021 and Office 2010 does NOT support it and Office 2013 need some registry modifications… so please update

Microsoft won’t deliberately prevent you from connecting to the service, but the quality of your Office 365 experience may diminish over time.

https://products.office.com/en/office-system-requirements#coreui-contentrichblock-nnuz9v1

Source : https://docs.microsoft.com/en-us/officeupdates/outlook-updates-msi

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