Microsoft released the February 2019 quarterly updates for Microsoft Exchange Server:

  • Exchange Server 2019 Cumulative Update 1 (KB4471391)
  • Exchange Server 2016 Cumulative Update 12 (KB4471392)
  • Exchange Server 2013 Cumulative Update 22 (KB4345836)
  • Exchange Server 2010 Service Pack 3 Update Rollup 26 (KB4487052)

The release contains important fixes to several Exchange security vulnerabilities, therefore it is highly recommended to deploy those updates.

When planning for deployment have in mind that update of Active Directory is required (Setup.exe /PrepareAD and Setup.exe /PrepareAllDomains)