What you need to know about Exchange server 2013?
Microsoft Exchange Server 2013 will reach the end of its life on April 11, 2023. This announcement means that Microsoft no longer provides technical support, security updates, or fixes for Exchange Server 2013.
If your organization plans on using Exchange Server 2013, it is important to upgrade to a newer version of Exchange, such as Exchange Server 2016 or Exchange Server 2019, in order to continue receiving technical support and security updates from Microsoft.