

PowerShell script must be run as Administrator.External Internet Connection from your Exchange server (required to download the Microsoft Safety Scanner and the IIS URL Rewrite Module).Use of the Exchange On-premises Mitigation Tool and the Microsoft Safety Scanner are subject to the terms of the Microsoft Privacy Statement: Requirements to run the Exchange On-premises Mitigation Tool We have not observed any impact to Exchange Server functionality via these mitigation methods nor do these mitigation methods make any direct changes that disable features of Exchange. This a better approach for Exchange deployments with Internet access and for those who want an attempt at automated remediation. Attempt to remediate compromises detected by the Microsoft Safety Scanner.Scan the Exchange Server using the Microsoft Safety Scanner.Mitigate against current known attacks using CVE-2021-26855 via a URL Rewrite configuration.+NEW Check for the latest version of EOMT and download it.This script has four operations it performs: EOMT.ps1 is completely automated and uses familiar mitigation methods previously documented.

We have not observed any impact to Exchange Server functionality via these mitigation methods. The Exchange On-premises Mitigation Tool automatically downloads any dependencies and runs the Microsoft Safety Scanner. We recommend this script over the previous ExchangeMitigations.ps1 script. This is the most effective way to help quickly protect and mitigate your Exchange Servers prior to patching. This script contains mitigations to help address the following vulnerabilities. Security scripts Exchange On-premises Mitigation Tool (EOMT)
