KB5001779 High Security Patch Exchange Server with XEOX

On April 13, 2021 Microsoft released secuity updates for Echange Server 2013, 2016 and 2019. Due to vulnerability issues these updates should be immediately installed.

These vulnerabilities affect Microsoft Exchange Server on on-premises installations. Exchange Online customers are already protected because Microsoft has already installed these updates. Therefore, these customers do not need to take any action.

Following Exchange versions receive the update:

  • Exchange Server 2013 CU23
  • Exchange Server 2016 CU19 and CU20
  • Exchange Server 2019 CU8 and CU9
automated updates

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