Patch Tuesday November 2026 is on 10 Nov 2026. Afterwards this page shows the fixed vulnerabilities, the zero-days and the known issues with the updates – the dated changes of the month are already here.
No issues are known so far with the updates of this month.
Three time zone changes affect Windows devices in Alberta, British Columbia and Morocco. Morocco moved to UTC+0 on 2026-09-20; Alberta and most of British Columbia change permanently on 2026-11-01. Microsoft is releasing fixes across September and October 2026 and recommends temporary workarounds for devices that cannot be updated in time.
Microsoft · Windows
Microsoft has released Windows updates that add new region-specific time zones for Alberta, British Columbia and Manitoba. On November 1, 2026, clocks in these provinces will not be set back by one hour. Devices without the update or the correct time zone setting might display the wrong local time.
Microsoft · Windows
Canada's abolition of daylight saving time on 2026-11-01 is reported to cause time errors in several Microsoft 365 services, including Outlook, Exchange Online and Teams. This is based on a news report and community research, not yet confirmed by the vendor. Some issues have a fix, others have no fix date yet.
Microsoft · Outlook, Exchange Online, Teams, Teams Rooms, SharePoint on-premises, Power Automate, Fabric, Dynamics 365 F&O
Fixed vulnerabilities, severity, zero-days and KB numbers come from the official Microsoft Security Update Guide (MSRC); known issues, workarounds and dated changes from our update issues, each with its source. “What to do now” is derived from this data using fixed rules, without AI.
We check whether your systems are affected, apply workarounds properly and plan for dated changes in good time.
