Hello there,
Microsoft has provided some tools to find out if you'll be running into issues before March 14. To test DCOM hardening, you can already enable it in Windows by creating the following registry key.
KB5004442—Manage changes for Windows DCOM Server Security Feature Bypass (CVE-2021-26414) https://support.microsoft.com/en-us/topic/kb5004442-manage-changes-for-windows-dcom-server-security-feature-bypass-cve-2021-26414-f1400b52-c141-43d2-941e-37ed901c769c
Path: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole\AppCompat
Value Name: "RequireIntegrityActivationAuthenticationLevel"
Type: dword
Value Data: default = 0x00000000 means disabled. 0x00000001 means enabled. If this value is not defined, it will default to disabled.
Hope this resolves your Query !!
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