![Catalin Cimpanu on Twitter: "CISA has published a supplemental ED ordering govt agencies to run Microsoft's Safety Scanner (MSERT) and Test-ProxyLogon.ps1 script to detect Exchange web shells by April 5 https://t.co/0fJnyCHckn https://t.co/AzkeFdxo32" / Catalin Cimpanu on Twitter: "CISA has published a supplemental ED ordering govt agencies to run Microsoft's Safety Scanner (MSERT) and Test-ProxyLogon.ps1 script to detect Exchange web shells by April 5 https://t.co/0fJnyCHckn https://t.co/AzkeFdxo32" /](https://pbs.twimg.com/media/Ex01EOrW8AMx45e.png)
Catalin Cimpanu on Twitter: "CISA has published a supplemental ED ordering govt agencies to run Microsoft's Safety Scanner (MSERT) and Test-ProxyLogon.ps1 script to detect Exchange web shells by April 5 https://t.co/0fJnyCHckn https://t.co/AzkeFdxo32" /
![One-Click Microsoft Exchange On-Premises Mitigation Tool – March 2021 – Microsoft Security Response Center One-Click Microsoft Exchange On-Premises Mitigation Tool – March 2021 – Microsoft Security Response Center](https://msrc-blog.microsoft.com/wp-content/uploads/2021/03/image-28-1024x523.png)