Recently, the security agencies have seen an increase in attacks against on-premise Microsoft Exchange servers. These attacks were made in email servers often used by small and medium-sized businesses. Due to these reasons, Microsoft thought of simple, easy-to-use, automated solutions to provide out-of-support versions of on-premise Microsoft Exchange servers.
With this in mind, Microsoft recently released a new one-click Mitigation Tool for the customers who are using on-premise Microsoft Exchange servers. This will help the customers who are unfamiliar with the patch/update process.