April 2, 2019—KB4490481 (OS Build 17763.404) Applies to: Windows 10, version 1809, Windows Server 2019, all versions https://support.microsoft.com/en-us/help/4490481 Edit: Windows 10 1809 KB4490481: the missing patch arrives, finally https://www.ghacks.net/2019/04/03/windows-10-1809-kb4490481-the-missing-patch-arrives-finally/
Security Updates 09 Apr 2019 https://portal.msrc.microsoft.com/en-us/security-guidance Security Update Summary https://portal.msrc.microsoft.com/en-us/security-guidance/summary
April 9, 2019—KB4493509 (OS Build 17763.437) Applies to: Windows 10, version 1809, Windows Server 2019, all versions https://support.microsoft.com/en-us/help/4493509/windows-10-update-kb4493509 April 9, 2019—KB4493464 (OS Build 17134.706) Applies to: Windows 10, version 1803 https://support.microsoft.com/en-us/help/4493464/windows-10-update-kb4493464 April 9, 2019—KB4493441 (OS Build 16299.1087) Applies to: Windows 10, version 1709 https://support.microsoft.com/en-us/help/4493441/windows-10-update-kb4493441 April 9, 2019—KB4493474 (OS Build 15063.1747) Applies to: Windows 10, version 1703 https://support.microsoft.com/en-us/help/4493474/windows-10-update-kb4493474 April 9, 2019—KB4493470 (OS Build 14393.2906) Applies to: Windows 10, version 1607, Windows Server 2016 https://support.microsoft.com/en-us/help/4493470/windows-10-update-kb4493470 April 9, 2019—KB4493475 (OS Build 10240.18186) Applies to: Windows 10 https://support.microsoft.com/en-us/help/4493475/windows-10-update-kb4493475
Microsoft Windows Security Updates April 2019 overview https://www.ghacks.net/2019/04/09/microsoft-windows-security-updates-april-2019-overview/
April 25, 2019—KB4493437 (OS Build 17134.753) Applies to: Windows 10, version 1803 https://support.microsoft.com/en-us/help/4493437/windows-10-update-kb4493437 April 25, 2019—KB4493440 (OS Build 16299.1127) Applies to: Windows 10, version 1709 https://support.microsoft.com/en-us/help/4493440/windows-10-update-kb4493440 April 25, 2019—KB4493436 (OS Build 15063.1784) Applies to: Windows 10, version 1703 https://support.microsoft.com/en-us/help/4493436/windows-10-update-kb4493436 April 25, 2019—KB4493473 (OS Build 14393.2941) Applies to: Windows 10, version 1607, Windows Server 2016 https://support.microsoft.com/en-us/help/4493473/windows-10-update-kb4493473 April 25, 2019—KB4498375 (OS Build 10240.18187) Applies to: Windows 10 https://support.microsoft.com/en-us/help/4498375/windows-10-update-kb4498375
Office 365 ProPlus Version 1904 Build 11601.20144 April 29, 2019 Release notes for Monthly Channel releases in 2019
