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 […]
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 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 […]
[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: […]
Below are the security fixes for the SharePoint OnPrem versions released this month. SharePoint Server 2016: KB 5002771 – SharePoint Server 2016 (language independent) KB 5002772 – SharePoint Server 2016 (language dependent) Microsoft Support recommends to install the complete August 2025 CU for SharePoint 2016 rather than individual security fixes. SharePoint Server 2019: KB 5002769 […]
The product group released the August 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 August 2025 CU will be available at the following Location in a couple of hours: KB 5002769 – August 2025 Update for […]
The product group released the August 2025 Cumulative Update for SharePoint Workflow Manager. The KB article for August 2025 CU will be available at the following Location in a couple of hours: KB 5002750 – August 2025 Update for SharePoint Workflow Manager The download for August 2025 CU is available through the following link: Download […]
In discussions with customers about the current situation — where active attacks are targeting on-premises SharePoint servers — it has become clear that additional clarity is needed regarding how AMSI integration works in SharePoint. Here are some of the questions we’ve received: Question: How can we verify if AMSI is working correctly in SharePoint […]
