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 — 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 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 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...

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—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—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—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—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...

.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...

.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...

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...

Description of the security update for Microsoft Exchange Server Subscription Edition RTM October 13, 2026 (KB5128895)

Description of the security update for Microsoft Exchange Server Subscription Edition RTM October 13, 2026 KB5128895 Applies To Exchange Server SE This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common...

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...

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...

.NET 8.0 Update - October 13, 2026

.NET 8.0 Update - October 13, 2026 .NET 8.0 has been refreshed with the latest update as of October 13, 2026. This update contains security fixes. See the release notes for details about updated packages. .NET 8.0 servicing updates are upgrades. The latest servicing update for 8.0 will remove the...

.NET 10.0 Update - October 13, 2026

.NET 10.0 Update - October 13, 2026 .NET 10.0 has been refreshed with the latest update as of October 13, 2026. This update contains security fixes. See the release notes for details about updated packages. .NET 10.0 servicing updates are upgrades. The latest servicing update for 10.0 will remove...

Description of Security Update 4 for Microsoft Skype for Business Server 2019 CU8: October 13, 2026 (KB5131693)

Description of Security Update 4 for Microsoft Skype for Business Server 2019 CU8: October 13, 2026 KB5131693 Applies To Skype for Business Server 2019 Summary This security update resolves vulnerabilities in Microsoft Skype for Business Server 2019. To learn more about these vulnerabilities, see...

.NET 9.0 Update - October 13, 2026

.NET 9.0 Update - October 13, 2026 .NET 9.0 has been refreshed with the latest update as of October 13, 2026. This update contains security fixes. See the release notes for details about updated packages. .NET 9.0 servicing updates are upgrades. The latest servicing update for 9.0 will remove the...

Description of Security Update 4 for Microsoft Skype for Business Server 2015 CU13: October 13, 2026 (KB5132779)

Description of Security Update 4 for Microsoft Skype for Business Server 2015 CU13: October 13, 2026 KB5132779 Applies To Skype for Business Server 2015 Summary This cumulative update resolves vulnerabilities in Microsoft Skype for Business Server 2015. To learn more about these vulnerabilities,...

Description of Security Update 2 for Microsoft Skype for Business Server SE CU1: October 13, 2026 (KB5131692)

Description of Security Update 2 for Microsoft Skype for Business Server SE CU1: October 13, 2026 KB5131692 Summary This cumulative update resolves vulnerabilities in Microsoft Skype for Business Server Subscription Edition. To learn more about these vulnerabilities, see the following security...

July 14, 2026—KB5099538 (OS Build 17763.9020)

July 14, 2026—KB5099538 OS Build 17763.9020 Applies To Windows Server 2019 Win 10 Ent LTSC 2019 Windows Secure Boot certificate expiration --- Important Secure Boot certificates used by most Windows devices were set to expire starting in June 2026. Microsoft has been updating these certificates o...

July 14, 2026—KB5099536 (OS Build 26100.33158)

July 14, 2026—KB5099536 OS Build 26100.33158 Applies To Windows Server 2025, all editions This cumulative update for Windows Server 2025 KB5099536, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows...

July 14, 2026—KB5099540 (OS Build 20348.5386)

July 14, 2026—KB5099540 OS Build 20348.5386 Applies To Windows Server 2022 This cumulative update for Windows Server 2022 KB5099540, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows release health...

July 14, 2026—KB5099539 (OS Builds 19045.7548 and 19044.7548)

July 14, 2026—KB5099539 OS Builds 19045.7548 and 19044.7548 Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows 10 IoT Enterprise LTSC 2021 Windows Secure Boot certificate expiration --- Important Secure Boot certificates used by most Windows devices were set to expire starting in...

July 14, 2026—KB5099535 (OS Build 14393.9339)

July 14, 2026—KB5099535 OS Build 14393.9339 Applies To Windows Server 2016, all editions Win 10 Ent LTSB 2016 Win 10 IoT Ent LTSB 2016 Windows Secure Boot certificate expiration --- Important Secure Boot certificates used by most Windows devices were set to expire starting in June 2026. Microsoft...

July 14, 2026—KB5101650 (OS Builds 26200.8875 and 26100.8875)

July 14, 2026—KB5101650 OS Builds 26200.8875 and 26100.8875 Applies To 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. --- Announcements and messages This section provides key notification...

July 14, 2026—KB5101649 (OS Build 28000.2525)

July 14, 2026—KB5101649 OS Build 28000.2525 Applies To Windows 11 version 26H1, all editions This cumulative update for Windows 11, version 26H1 KB5101649 includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release. Visit the...

July 14, 2026—KB5099444 (Monthly Rollup)

July 14, 2026—KB5099444 Monthly Rollup Applies To Windows Server 2012 R2 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make sure...

July 14, 2026—KB5099445 (Monthly Rollup)

July 14, 2026—KB5099445 Monthly Rollup Applies To Windows Server 2012 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure all...

July 14, 2026—KB5099414 (OS Build 22631.7376)

July 14, 2026—KB5099414 OS Build 22631.7376 Applies To Windows 11 version 23H2, all editions This cumulative update for Windows 11, version 23H2 KB5099414, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the...

September 8, 2026—KB5122882 (OS Build 20348.5622)

September 8, 2026—KB5122882 OS Build 20348.5622 Applies To Windows Server 2022 This cumulative update for Windows Server 2022 KB5122882, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows release healt...

September 8, 2026—KB5122878 (OS Builds 19045.7725 and 19044.7725)

September 8, 2026—KB5122878 OS Builds 19045.7725 and 19044.7725 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 will end soon. For information about the availability of an Extended Security...

September 8, 2026—KB5122880 (OS Build 22631.7582)

September 8, 2026—KB5122880 OS Build 22631.7582 Applies To Windows 11 version 23H2, all editions This cumulative update for Windows 11, version 23H2 KB5122880, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit th...

September 8, 2026—KB5122871 (OS Build 26100.33438)

September 8, 2026—KB5122871 OS Build 26100.33438 Applies To Windows Server 2025, all editions This cumulative update for Windows Server 2025 KB5122871, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Window...

September 8, 2026—KB5123066 (Monthly Rollup)

September 8, 2026—KB5123066 Monthly Rollup Applies To Windows Server 2012 R2 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make...

September 8, 2026—KB5123065 (Monthly Rollup)

September 8, 2026—KB5123065 Monthly Rollup Applies To Windows Server 2012 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure a...

September 8, 2026—KB5122876 (OS Build 17763.9245)

September 8, 2026—KB5122876 OS Build 17763.9245 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 Thi...

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...

September 8, 2026—KB5123099 (OS Build 14393.9512)

September 8, 2026—KB5123099 OS Build 14393.9512 Applies To Windows Server 2016, all editions Win 10 Ent LTSB 2016 Win 10 IoT Ent LTSB 2016 Important Free support for Windows 10 Enterprise 2016 LTSB and Windows Server 2016 will soon end. For information about the availability of Extended Security...

September 8, 2026—KB5124012 (OS Build 28000.2954)

September 8, 2026—KB5124012 OS Build 28000.2954 Applies To Windows 11 version 26H1, all editions This cumulative update for Windows 11, version 26H1 KB5124012 includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release. Visit the...