Entra Connect would not apply here. Seamless SSO only is for older Windows versions:
Microsoft Entra Connect and Windows 11 24H2
Dear All,
Thank you for your continued support.
As the title indicates, we are building an authentication infrastructure that integrates with on-premises AD by implementing Microsoft Entra Connect. In our verification, we confirmed that SSO settings for My Account page, Office, OneDrive, etc., were working smoothly.
Our verification environment consisted of two Windows Server 2022 servers, one for the Entra Connect server and the other for AD, with clients running Windows 10 or Windows 11 23H2.
However, as soon as we updated the client OS to Windows 11 24H2, SSO for My Account page, Office, OneDrive, etc., stopped working all at once.
The environment at the construction site consists of a single Windows Server for the Entra Connect server, with AD running on Windows Server 2019, and domain-joined clients running Windows 11 24H2.
Personally, I suspect that the security-related policies added in 24H2 are interfering, or that the functional level of the AD side (Windows Server 2019) is not compatible with 24H2.
Has anyone else experienced similar issues?
We are currently unable to prepare a verification environment immediately, and we are at a loss.
What we want to achieve is the content of the following URL:
Quickstart: Microsoft Entra seamless single sign-on - Microsoft Entra ID | Microsoft Learn