The new one-click Microsoft Exchange On-Premises Mitigation Tool is meant to serve as an interim mitigation for those that aren t familiar with the patching process or that haven t yet applied the Exchange security updates released on March 2, Microsoft explains in a blog post. The company last reported some 82,000 Exchange Servers remain vulnerable to the exploits.
This is not a replacement for the Exchange Server security update, Microsoft says, but it is an efficient way to defend against the highest risks to Internet-connected, on-premises Exchange Servers for organizations that haven t yet applied the patch. The tool has been tested across Exchange Server 2013, 2016, and 2019, all of which are affected by the recently patched flaws.