Microsoft has finally fixed the long-standing single sign-on problem in Windows 10

Earlier this week, Microsoft released optional update KB5043133 for Windows 10, which brings several improvements to the Start menu and fixes the sign-in error that some users have been experiencing since March. When authenticating to Windows 10 using Single sign-on (SSO), users were repeatedly prompted to sign in again when opening Microsoft services.

On the support page, in the description of the KB5043133 update, Microsoft mentions changes to the Start menu that can be described as more visual than functional. For example, your profile photo now appears in a different location, and the left Start menu bar has a different background color.

More important, especially for corporate users, is to fix the SSO authentication bug that has been plaguing them for over six months now. When automatically signing in to Windows 10 using SSO, many users repeatedly received repeated authentication requests when opening Microsoft services.

SSO is based on creating a trust relationship between the service provider application and the access control system. This relationship is usually based on the exchange of certificates. Identity data takes the form of tokens containing information about the user, such as email or username. SSO allows users to securely authenticate to multiple applications and sites using one set of credentials

The Microsoft blog also announced changes that will make using SSO easier and more flexible.

The KB5043133 update also contains fixes for Microsoft Edge freezing in Internet Explorer mode, a fix for crashes when using Windows Server Explorer or the taskbar, and a fix for work folders that sometimes did not sync when the built-in antivirus was activated.

Update KB5043131 is currently only available to Windows 10 22H2 users and must be installed manually. To install it, you need to check for new updates in Windows Update, select update KB5043133 and click Download and Install, and then restart your PC.