Important: A problem with this CU has been identied: Upgrading databases from January 2026 CU to March 2026 CU will fail! It is important to install February 2026 CU and upgrade the content databases using the Configuration Wizard before installing March CU. See here for more details: Trending Issue: SPSE – Configuration Wizard will fail […]
Important: If your current farm patch level is September 2025 CU, execute the following PowerShell script to correct the folder permissions on the relevant folders otherwise installing the SharePoint fixes will fail: Fix-SeptemberCU-Permission-Problem.ps1 Alternatively you can also remove the NT Authority\system account from WSS_WPG and IIS_IUSRS local security groups of the SharePoint machines. For more […]
Important: If your current farm patch level is September 2025 CU, execute the following PowerShell script to correct the folder permissions on the relevant folders otherwise installing the SharePoint fixes will fail: Fix-SeptemberCU-Permission-Problem.ps1 Alternatively you can also remove the NT Authority\system account from WSS_WPG and IIS_IUSRS local security groups of the SharePoint machines. For more […]
The product group released the March 2026 Cumulative Update for Office Online Server. The KB article for March 2026 CU will be available at the following Location in a couple of hours: KB 5002846 – March 2026 Update for Office Online Server The download for March 2026 CU is available through the following link: Download […]
A race condition in SharePoint Server can lead to application pool worker process crashes with a combination of the following Exception codes 0xC06D007E and 0xE0434352: Faulting application name: w3wp.exe, version: 10.0.20348.1, time stamp: 0xcfdb13d8 Faulting module name: KERNELBASE.dll, version: 10.0.20348.4294, time stamp: 0x689cd397 Exception code: 0xc06d007e Fault offset: 0x0000000000041b39 Faulting process id: 0x32fc Faulting application […]
After September 2025 CU for SharePoint Server Subscription Edition application pool worker process might crash with Exception code 0xC0000409. Event log will contain entries similar to this: Faulting application name: w3wp.exe, version: 10.0.17763.1, time stamp: 0xcfdb13d8 Faulting module name: owssvr.dll, version: 16.0.19127.20100, time stamp: 0x689cd397 Exception code: 0xc0000409 Fault offset: 0x000000000033b39b Faulting process id: 0x32fc […]
To enhance security a new Exploit Protection Setting was added to Windows when installing September 2025 CU. This adds several protections to OWSTIMER.EXE including an option that prevents creating child processes. SharePoint 2010 workflows require the workflow definition to be compiled using the CSC.EXE compiler – and this fails due to this Exploit Protection setting. […]
Important: If your current farm patch level is September 2025 CU, remove the NT Authority\system account from WSS_WPG and IIS_IUSRS local security groups of the SharePoint machines – otherwise installing the SharePoint fixes will fail. For more details check this article: Trending Issue: SharePoint fixes fail to install after installation of September 2025 CU Below […]
Important: If your current farm patch level is September 2025 CU, remove the NT Authority\system account from WSS_WPG and IIS_IUSRS local security groups of the SharePoint machines – otherwise installing the SharePoint fixes will fail. For more details check this article: Trending Issue: SharePoint fixes fail to install after installation of September 2025 CU The […]
Important: If your current farm patch level is September 2025 CU, remove the NT Authority\system account from WSS_WPG and IIS_IUSRS local security groups of the SharePoint machines – otherwise installing the SharePoint fixes will fail. For more details check this article: Trending Issue: SharePoint fixes fail to install after installation of September 2025 CU The […]
Important: If your current farm patch level is September 2025 CU, remove the NT Authority\system account from WSS_WPG and IIS_IUSRS local security groups of the SharePoint machines – otherwise installing the SharePoint fixes will fail. For more details check this article: Trending Issue: SharePoint fixes fail to install after installation of September 2025 CU The […]
The product group released the February 2026 Cumulative Update for Office Online Server. The KB article for February 2026 CU will be available at the following Location in a couple of hours: KB 5002835 – February 2026 Update for Office Online Server The download for February 2026 CU is available through the following link: Download […]
