[German]A small addendum regarding "login problems with Microsoft's cloud". Users have been annoyed by repetitive SSO logins for months. It was a change Microsoft has made for the European Digital Markets Act that resulted in this annoying behavior. Microsoft has fixed now this problem in Windows 10 with the preview update KB5043131 and will roll out this fix globally in October 2024.
Advertising
Issue known for months
I first discussed a problem at the beginning of April 2024 in my German blog post Gibt es Probleme mit Single Sign On (SSO) bei Maschinen mit Azure Entra ID? It is about the topic of Single Sign On (SSO for short) for applications that use the Microsoft Cloud (Azure). The technical term is now "Microsoft Entra Single Sign-On (SSO)" and is explained on this Microsoft support site.
Single sign-on (SSO) is intended to simplify access to the SaaS apps (Software-as-a-Service), cloud apps or local apps used. There is one login to Microsoft Entra ID, which should then apply to all apps used. In December 2023, Microsoft announced some changes to Single Sign One in the tech community post Upcoming changes to Windows single sign-on. This was necessary for users in Europe to ensure compliance with the requirements of the Digital Markets Act (DMA) in the European Economic Area (EEA). To this end, the functionality for SSO under Windows is to be changed from 2024.
Microsoft 365 Entra ID-Anmeldung hängt
In this context, German blog reader E. H. contacted me by email because he was annoyed by errors with single sign-on (SSO) in his environment. In his environment, the strange phenomenon occurs that users are sporadically no longer able to log in with the Microsoft desktop apps such as Excel, Word and Co. The user login to the relevant Microsoft 365 login gets stuck with the above message. Microsoft later confirmed the problem (see Azure Entra ID: Microsoft confirms issues with Single Sign On (SSO)).
Fix with Windows 10 Preview Update KB5043131
I had only noticed it in passing when I published the post Windows 10 22H2 Preview Update KB5043131 (September 24, 2024) – Martin Geuß noticed it here. Microsoft has addressed the single sign-on bug and delivered a fix with the preview update KB5043131 for Windows 10 version 22H2. It says:
Advertising
[Microsoft Entra single sign-on (SSO)] The SSO notice that the European Digital Markets Act (DMA) requires prompts too often. This occurs when you authenticate using a certificate. To learn more, see Upcoming changes to Windows single sign-on.
The bug was caused by adaptations to the European Digital Markets Act (DMA) in the routines on the clients. Microsoft believes to have fixed the problem with the update in question. Can anyone confirm this?
Advertising
