After installing July 2026 CU you might experience the issue that Office Online Server will fail to show Office and PDF documents. Symptoms The issue is typically reflected in the ULS logs with entries similar to the following: w3wp.exe (0xXXXX) SharePoint Foundation Claims Authentication ahds5 Unexpected SPJsonWebSecurityBaseTokenHandler: ValidateTokenIssuer rejected Issuer […]
After installing July 2026 CU you might experience failures with SharePoint 2010 workflows. The reason is that – depending on the workflow actions used in your workflows – additional types might need to be allow listed. Symptoms: In the ULS log you will find entries similar to the following: w3wp.exe (0xXXXX) SharePoint Foundation […]
Here is a quick summary of the major SharePoint and Project Server components that reach end of support today, July 15, 2026, along with the recommended upgrade or replacement path: Product, Feature or Component Upgrade Path/Alternative SharePoint Server 2016 SharePoint Server Subscription Edition SharePoint Server 2019 SharePoint Server Subscription Edition Project Server 2016 Project Server […]
After installing June 2026 CU for SharePoint Server 2016, 2019 and Subscription Edition SharePoint 2010–style workflows are failing. Solution A fix for this issue has been released with July 2026 CU for all supported SharePoint Version (2016, 2019, Subscription Edition) Additional Information Adding it here for visibility as it got lost in the comments A) […]
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 […]
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 July 2026 Cumulative Update for Office Online Server. The KB article for July 2026 CU will be available at the following Location in a couple of hours: KB 5002884 – July 2026 Update for Office Online Server The download for July 2026 CU is available through the following link: Download […]
A change in the behavior of the Text web part in the Modern UI was introduced with the January 2026 CU for SharePoint Server Subscription Edition: When the Text and table formatting pane is open, the Text web part’s content area becomes read‑only. Editing is only possible again after the formatting pane is closed. This […]
We have received multiple reports indicating that SharePoint 2010–style workflows are failing after installing the June 2026 Cumulative Update (CU). Symptoms The issue is typically reflected in the ULS logs with entries similar to the following: w3wp.exe (0xXXXX) SharePoint Foundation Legacy Workflow Infrastructure 4letu High Block the namespace: clr-namespace:System.CodeDom;Assembly=System, Version=4.0.0.0, […]
The 26H1 feature update for SharePoint Server Subscription Edition has been released today and is included in the June 2026 CU for SharePoint Server Subscription Edition. About Feature Updates for SharePoint Server Subscription Edition: Releasing new features for a product which is used by a large number of users creates challenges for IT departments, e.g. […]
