Manage time zone settings in Outlook

Manage time zone settings in Outlook Applies To Outlook for Microsoft 365 Outlook 2024 Outlook 2016 Office 365 Small Business Outlook.com New Outlook for Windows Get help with Copilot How do I swap time zone positions? How do I add a second or third time zone? Get Copilot's help managing time zon...

October 28, 2026—KB5127653 (OS Builds 28000.3365) Preview

October 28, 2026—KB5127653 OS Builds 28000.3365 Preview Applies To Windows 11 version 26H1, all editions This cumulative update for Windows 11, version 26H1 KB5127653, includes production-quality improvements. Announcements and messages This section provides key notifications related to this...

October 28, 2026 — KB5127936 (OS Builds 26300.9818 and 26200.9818) Preview

October 28, 2026 — KB5127936 OS Builds 26300.9818 and 26200.9818 Preview Applies To Windows 11 version 26H2, all editions Windows 11 version 25H2, all editions This cumulative update for Windows 11, versions 26H2 and 25H2 KB5127936, includes production-quality improvements. Announcements and...

October 26, 2026—KB5134123 (OS Build 14393.9615) Out-of-band

October 26, 2026—KB5134123 OS Build 14393.9615 Out-of-band Applies To Windows Server 2016, all editions Windows 10 LTSB 2016 ESU Important Support for Windows 10 Enterprise LTSB 2016 and Windows 10 IoT Enterprise 2016 LTSB ended on October 13, 2026. Support for Windows Server 2016 ends soon. To...

October 26, 2026—KB5134130 (OS Build 22631.7654) Out-of-band

October 26, 2026—KB5134130 OS Build 22631.7654 Out-of-band Applies To Windows 11 version 23H2, all editions This non-security out-of-band OOB update for Windows 11, version 23H2 KB5134130 is cumulative. It includes updates from previous releases, along with additional non-security improvements. W...

October 26, 2026—KB5134124 (OS Build 17763.9378) Out-of-band

October 26, 2026—KB5134124 OS Build 17763.9378 Out-of-band Applies To Windows Server 2019 Win 10 Ent LTSC 2019 Summary This non-security out-of-band OOB update for Windows 10, version 1809 and Windows Server 2019 KB5134124 is cumulative. It includes updates from previous releases, along with...

October 26, 2026—KB5134137 (OS Build 26100.33674) Out-of-band

October 26, 2026—KB5134137 OS Build 26100.33674 Out-of-band Applies To Windows Server 2025, all editions This non-security out-of-band OOB update for Windows Server 2025 KB5134137 is cumulative. It includes updates from previous releases, along with additional non-security improvements. Who shoul...

October 26, 2026—KB5134134 (OS Build 28000.3237) Out-of-band

October 26, 2026—KB5134134 OS Build 28000.3237 Out-of-band Applies To Windows 11 version 26H1, all editions This non-security out-of-band OOB update for Windows 11, version 26H1 KB5134134 is cumulative. It includes updates from previous releases, along with additional non-security improvements. W...

October 26, 2026—KB5134140 (OS Build 20348.5773) Out-of-band

October 26, 2026—KB5134140 OS Build 20348.5773 Out-of-band Applies To Windows Server 2022 This non-security out-of-band OOB update for Windows Server 2022 KB5134140 is cumulative. It includes updates from previous releases, along with additional non-security improvements. Who should install this...

October 26, 2026—KB5134133 (OS Builds 26300.9725, 26200.9725 and 26100.9725) Out-of-band

October 26, 2026—KB5134133 OS Builds 26300.9725, 26200.9725 and 26100.9725 Out-of-band Applies To Windows 11 version 26H2, all editions Windows 11 version 25H2, all editions Windows 11 version 24H2, all editions This non-security out-of-band OOB update for Windows 11, versions 24H2, 25H2, and 26H...

October 26, 2026—KB5134125 (OS Builds 19045.7811 and 19044.7811) Out-of-band

October 26, 2026—KB5134125 OS Builds 19045.7811 and 19044.7811 Out-of-band Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows 10 IoT Enterprise LTSC 2021 Important Free support for Windows 10 Enterprise LTSC 2021 ends on January 12, 2027. To learn about continuing support, see Plan...

.NET 10.0 Update - October 25, 2026

.NET 10.0 Update - October 25, 2026 .NET 10.0 has been refreshed with an out-of-band security update as of October 25, 2026. This update is separate from the regular monthly servicing release. See the release notes for details about updated packages. Important: This out-of-band security update...

.NET 9.0 Update - October 25, 2026

.NET 9.0 Update - October 25, 2026 .NET 9.0 has been refreshed with an out-of-band security update as of October 25, 2026. This update is separate from the regular monthly servicing release. See the release notes for details about updated packages. Important: This out-of-band security update...

.NET 8.0 Update - October 25, 2026

.NET 8.0 Update - October 25, 2026 .NET 8.0 has been refreshed with an out-of-band security update as of October 25, 2026. This update is separate from the regular monthly servicing release. See the release notes for details about updated packages. Important: This out-of-band security update...

KB5125471 - Cumulative Update 10 for SQL Server 2025

KB5125471 - Cumulative Update 10 for SQL Server 2025 Release Date: October 22, 2026 Version: 17.0.5035.5 Summary This article describes Cumulative Update 10 CU10 for Microsoft SQL Server 2025. This update package contains 37 fixes that were issued after the release of SQL Server 2025 Cumulative...

Description of the security update for Office Online Server: October 13, 2026 (KB5002928)

Description of the security update for Office Online Server: October 13, 2026 KB5002928 Applies To Office Online Server Summary This security update resolves Microsoft Excel remote code execution vulnerability and Microsoft Excel Information Disclosure vulnerability. To learn more about the...

Description of the security update for SharePoint Server Subscription Edition: October 13, 2026 (KB5002927)

Description of the security update for SharePoint Server Subscription Edition: October 13, 2026 KB5002927 Applies To SharePoint Server Subscription Edition Summary Important If you're currently running SharePoint Workflow Manager, you must install SharePoint Workflow Manager KB5002799 to your far...

Description of the security update for SharePoint Server 2019: July 14, 2026 (KB5002883)

Description of the security update for SharePoint Server 2019: July 14, 2026 KB5002883 Applies To SharePoint Server 2019 Summary Important If you're currently running SharePoint Workflow Manager, you must install the SharePoint Workflow Manager KB5002799 to your farm before you install this...

Description of the security update for SharePoint Server Subscription Edition: July 14, 2026 (KB5002882)

Description of the security update for SharePoint Server Subscription Edition: July 14, 2026 KB5002882 Applies To SharePoint Server Subscription Edition Summary Important If you're currently running SharePoint Workflow Manager, you must install SharePoint Workflow Manager KB5002799 to your farm...

Description of the security update for SharePoint Server Subscription Edition: August 11, 2026 (KB5002893)

Description of the security update for SharePoint Server Subscription Edition: August 11, 2026 KB5002893 Applies To SharePoint Server Subscription Edition Summary Important If you're currently running SharePoint Workflow Manager, you must install SharePoint Workflow Manager KB5002799 to your farm...

Description of the security update for SharePoint Server 2016: July 14, 2026 (KB5002891)

Description of the security update for SharePoint Server 2016: July 14, 2026 KB5002891 Applies To SharePoint Server 2016 Summary Important If you're currently running SharePoint Workflow Manager, you must install the SharePoint Workflow Manager KB5002799 to your farm before you install this...

October 13, 2026-KB5127685 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019

October 13, 2026-KB5127685 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8 The October 13, 2026 update for Windows 10, version 1809 and Windows Server 2019...

October 13, 2026-KB5127683 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 and Windows 10 Version 22H2

October 13, 2026-KB5127683 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 and Windows 10 Version 22H2 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8 The October 13, 2026 update for Windows 10 Version 21H2 and Windows 10 Versio...

October 13, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 R2 (KB5127668)

October 13, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 R2 KB5127668 Applies To .NET Note Applies to: Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2 Important The...

October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 (KB5127688)

October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 KB5127688 Applies To .NET Note Applies to: Microsoft .NET Framework 4.8 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled devi...

October 13, 2026-KB5127690 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2, Windows 11, version 25H2 and Microsoft server operating system 24H2

October 13, 2026-KB5127690 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2, Windows 11, version 25H2 and Microsoft server operating system 24H2 Applies To .NET Note Release date: October 13, 2026 Version: .NET Framework 3.5 and 4.8.1 The October 13, 2026 update for...

October 13, 2026-KB5127689 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2

October 13, 2026-KB5127689 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8.1 The October 13, 2026 update for Windows 10 Version 21H2 and Windows 10...

October 13, 2026-KB5127693 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows Server 2022

October 13, 2026-KB5127693 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows Server 2022 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8.1 The October 13, 2026 update for Windows Server 2022 includes security and cumulative reliability...

October 13, 2026-KB5127691 Cumulative Update for .NET Framework 4.8.1 for Windows 11, version 26H1

October 13, 2026-KB5127691 Cumulative Update for .NET Framework 4.8.1 for Windows 11, version 26H1 Applies To .NET Note Release date: October 13, 2026 Version: .NET Framework 4.8.1 The October 13, 2026 update for Windows 11, version 26H1 includes security and cumulative reliability improvements i...

October 13, 2026-KB5127687 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2022

October 13, 2026-KB5127687 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2022 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8 The October 13, 2026 update for Windows Server 2022 includes security and cumulative reliability improvements...

October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 (KB5127686)

October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 KB5127686 Applies To .NET Note Applies to: Microsoft .NET Framework 4.8 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device...

October 13, 2026—KB5126653 (OS Build 22631.7652)

October 13, 2026—KB5126653 OS Build 22631.7652 Applies To Windows 11 version 23H2, all editions This cumulative update for Windows 11, version 23H2 KB5126653, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the...

October 13, 2026—KB5126651 (OS Build 17763.9376)

October 13, 2026—KB5126651 OS Build 17763.9376 Applies To Windows Server 2019 Win 10 Ent LTSC 2019 Summary This article lists the security issues and quality improvements included in this cumulative security update. Windows Server 2019 Windows 10, version 1809 Applies to: Windows Server 2019 This...

October 13, 2026—KB5126657 (OS Builds 19045.7807 and 19044.7807)

October 13, 2026—KB5126657 OS Builds 19045.7807 and 19044.7807 Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows 10 IoT Enterprise LTSC 2021 Important Free support for Windows 10 Enterprise LTSC 2021 ends on January 12, 2027. To learn about continuing support, see Plan for Windows...

October 13, 2026—KB5126655 (OS Build 20348.5761)

October 13, 2026—KB5126655 OS Build 20348.5761 Applies To Windows Server 2022 This cumulative update for Windows Server 2022 KB5126655, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows release health...

KB5126649: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: October 13, 2026

KB5126649: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: October 13, 2026 Applies To Win 10 Ent LTSB 2016 Win 10 IoT Ent LTSB 2016 Windows Server 2016, all editions Important Free support for Windows 10 Enterprise LTSB 2016 and Windows 10 IoT Enterprise 2016 LTSB en...

October 13, 2026—KB5126646 (OS Build 26100.33650)

October 13, 2026—KB5126646 OS Build 26100.33650 Applies To Windows Server 2025, all editions This cumulative update for Windows Server 2025 KB5126646, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows...

October 13, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 (KB5127664)

October 13, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 KB5127664 Applies To .NET Note Applies to: Microsoft .NET Framework 3.5 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled devi...

October 13, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 (KB5127660)

October 13, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 KB5127660 Applies To .NET Note Applies to: Microsoft .NET Framework 3.5 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device...

KB5127357: Servicing stack update for Windows Server 2012: October 13, 2026

KB5127357: Servicing stack update for Windows Server 2012: October 13, 2026 Applies To Windows Server 2012 ESU Summary This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates SSU makes sure that you have a robust...

KB5127356: Servicing stack update for Windows Server 2012 R2: October 13, 2026

KB5127356: Servicing stack update for Windows Server 2012 R2: October 13, 2026 Applies To Windows Server 2012 R2 ESU Summary This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates SSU makes sure that you have a...

KB5126967 - Description of the security update for SQL Server 2025 CU9: October 13, 2026

KB5126967 - Description of the security update for SQL Server 2025 CU9: October 13, 2026 Applies To SQL Server 2025 on Windows all editions, SQL Server 2025 on Linux all editions Release date: October 13, 2026 Version: 17.0.5015.4 Summary Known issues in this update Improvements and fixes include...

October 13, 2026—KB5127648 (OS Builds 26300.9711, 26200.9711 and 26100.9711)

October 13, 2026—KB5127648 OS Builds 26300.9711, 26200.9711 and 26100.9711 Applies To Windows 11 version 26H2, all editions Windows 11 version 25H2, all editions Windows 11 version 24H2, all editions Want a quick overview?: Watch the Windows 11 release note video for this update. --- Announcement...

October 13, 2026—KB5126836 (Monthly Rollup)

October 13, 2026—KB5126836 Monthly Rollup Applies To Windows Server 2012 R2 ESU Important Windows Server 2012 R2 reached the end of support on October 10, 2023. The Extended Security Updates ESU program for Windows Server 2012 R2 ended on October 13, 2026. This update is the final security update...

October 13, 2026—KB5126835 (Monthly Rollup)

October 13, 2026—KB5126835 Monthly Rollup Applies To Windows Server 2012 ESU Important End of support information: Windows Server 2012 reached the end of support on October 10, 2023. The Extended Security Updates ESU program for Windows Server 2012 ended on October 13, 2026. This update is the...

October 13, 2026-KB5127684 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016

October 13, 2026-KB5127684 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 4.8 The October 13, 2026 update for Windows 10, version 1607 and Windows Server 2016 includes securi...

KB5126934 - Description of the security update for SQL Server 2022 CU27: October 13, 2026

KB5126934 - Description of the security update for SQL Server 2022 CU27: October 13, 2026 Applies To SQL Server 2022 on Windows all editions SQL Server 2022 on Linux all editions Release date: October 13, 2026 Version: 16.0.4305.5 Summary Known issues in this update Improvements and fixes include...

October 13, 2026—KB5126868 (OS Build 14393.9612)

October 13, 2026—KB5126868 OS Build 14393.9612 Applies To Windows Server 2016, all editions Win 10 Ent LTSB 2016 Win 10 IoT Ent LTSB 2016 Important Support for Windows 10 Enterprise LTSB 2016 and Windows 10 IoT Enterprise 2016 LTSB ended on October 13, 2026. Support for Windows Server 2016 ends...

October 13, 2026—KB5127646 (OS Build 28000.3231)

October 13, 2026—KB5127646 OS Build 28000.3231 Applies To Windows 11 version 26H1, all editions This cumulative update for Windows 11, version 26H1 KB5127646 includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release. Visit the...

October 13, 2026-KB5127692 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11 23H2

October 13, 2026-KB5127692 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11 23H2 Applies To .NET Note Release date: October 13, 2026 Version: .NET Framework 3.5 and 4.8.1 The October 13, 2026 update for Windows 11 23H2 includes security and cumulative reliability improvements in...