Microsoft Exchange Server Vulnerabilities Mitigations - updated March 15, 2021

Update March 15, 2021: If you have not yet patched, and have not applied the mitigations referenced below, a one-click tool, the Exchange On-premises Mitigation Tool is now our recommended path to mitigate until you can patch. Microsoft previously blogged our strong recommendation that customers upgrade their on-premises Exchange environments to the latest supported version.