Microsoft is urging organizations to protect their Exchange servers from cyberattacks by keeping them updated and hardened, since online criminals are still going after valuable data in the email system. Enterprises need to make sure to install the latest Cumulative Updates (CUs) and Security Updates (SUs) on the Exchange servers – and occasionally on Exchange Management Tools workstations – and to run manual tasks like enabling Extended Protection and certificate signing of PowerShell serialization payloads, according to the vendor’s Exchange Team.

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