Iis 10 url rewrite download9/21/2023 \ExchangeMitigations.ps1 -FullPathToMSI "FullPathToMSI" -WebSiteNames "Default Web Site" -ApplyAllMitigations To apply all mitigations with MSI install Script requires PowerShell 3.0 and later and must be executed from an elevated PowerShell Session. You must uninstall the URL Rewrite module and reinstall the correct version. If there is a mismatch between the URL Rewrite module and IIS version, ExchangeMitigations.ps1 will not apply the mitigation for CVE-2021-26855. Installing URL Rewrite version 2.1 on IIS versions 8.5 and lower may cause IIS and Exchange to become unstable. ![]() ![]() This should only be used as a temporary mitigation until your Exchange Servers can be fully patched, recommended guidance is to apply all of the mitigations at once.įor this script to work you must have the IIS URL Rewrite Module installed which can be done via this script using the -FullPathToMSI parameter.įor IIS 10 and higher URL Rewrite Module 2.1 must be installed, you can download version 2.1 here:įor IIS 8.5 and lower Rewrite Module 2.0 must be installed, you can download version 2.0 here: This script contains 4 mitigations to help address the following vulnerabilities:įor more information on each mitigation please visit ![]() Download the latest release: ExchangeMitigations.ps1
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