End of Microsoft Product Support
9 June
In 2019–2020, support for a part of popular Microsoft products completely ceases. End of support means canceling the provision of security updates, therefore, to ensure security, it is recommended that you upgrade to the latest cloud or local version.
Read the full text here:
https://support.microsoft.com/ru-ru/help/4487594/prepare-now-for-end-of-support-in-2019-and-2020