Information: The issue described in this article currently affects only customers which executed the SharePoint Configuration Wizard after installing the language independent fix from September 2025 CU and the installation of the language dependent fix. Starting with October 2025 CU for SharePoint Server (all versions) most customers might be affected by this problem – so […]
SharePoint Server 2025 CU for SharePoint Server 2016, 2019 and Subscription Edition includes security hardening for SharePoint Server 2013 workflows which enforces the most recent SharePoint Workflow Manager updates to be installed on SPWFM. As a side effect this also prevents classic workflow manager workflows from running as this version does not comply with this […]
I have received several reports from users that after installing September 2025 CU for SharePoint Server 2016, 2019 or Subscription Edition the SharePoint configuration wizard failed with the following error message: System.InvalidOperationException was thrown. Additional exception information: An internal error occurred. The program cannot continue to run. The program stopped because of the following: Copy […]
To enhance security of SharePoint Server, three new security features are being introduced in September 2025 CU. These enhancements apply to all supported SharePoint versions — 2016, 2019, and Subscription Edition — and I’d like to highlight them in this article: Machine Key Rotation Timer job AMSI enabled for all web applications Test-DefenderAndAmsiWorkProperly Cmdlet to […]
The 25H2 feature update for SharePoint Server Subscription Edition has been released today and is included in the September 2025 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. […]
Below are the security fixes for the SharePoint OnPrem versions released this month. SharePoint Server 2016: KB 5002778 – SharePoint Server 2016 (language independent) KB 5002777 – SharePoint Server 2016 (language dependent) Microsoft Support recommends to install the complete September 2025 CU for SharePoint 2016 rather than individual security fixes. SharePoint Server 2019: KB 5002775 […]
The product group released the September 2025 Cumulative Update for SharePoint Server Subscription Edition. Monthly SharePoint Server Subscription edition updates are released as a single unified “uber” package containing both the language independent and language dependent fixes. Language independent and language dependent fixes will no longer be released separately. This is similar to the full […]
The product group released the September 2025 Cumulative Update for SharePoint Server 2019 product family. SharePoint Server 2019 is patched with a language dependent and a language independent fix. The KB article for September 2025 CU will be available at the following Location in a couple of hours: KB 5002775 – September 2025 Update for […]
The product group released the September 2025 Cumulative Update for SharePoint Server 2016 product family. This CU also includes Feature Pack 1 which was released with December 2016 CU and Feature Pack 2 which was released with September 2017 CU. The KB articles for September 2025 CU should be available at the following locations in […]
The product group released the September 2025 Cumulative Update for Office Online Server. The KB article for September 2025 CU will be available at the following Location in a couple of hours: KB 5002776 – September 2025 Update for Office Online Server The download for September 2025 CU is available through the following link: Download […]
[Update from August 22nd – additional assemblies added] SharePoint Workflow Manager August 2025 CU switched from using the System.Data.SqlClient database connectivity layer to the modern and more powerful Microsoft.Data.SqlClient database connectivity layer. Microsoft.Data.SqlClient has different dependencies which are not automatically fulfilled on machines which do not have SharePoint Server Subscription Edition installed. Error messages similar […]
Starting with the September 2024 Cumulative Update (CU), SharePoint no longer supports importing new BDC models based on the LobSystem types DotNetAssembly and WebService. Beginning with the June 2025 CU, previously imported BDC models using these system types are also disabled. These or similar errors are returned when trying to use this BDC system type: […]
