Edge Authentication Window when using Microsoft SSO

Hello!

We have configured Microsoft/EntraID SSO for login to 1Password. The users are logged in to the Windows PC with an Active Directory User - the Users are synchronized to EntraID, where SSO with 1Password is configured.

Recently we are experiencing the issue, that for every first 1Password unlock after a PC restart, when we click "Login with Microsoft" in 1Password, a Browser window opens, asking for the Microsoft 365/EntraID login credentials. The login to 1Password is successful anyway, either if we enter the credentials in this window, or if we do not enter any credentials and close the window.

How can we prevent that Browser window asking for credentials? Is there something we need to configure on 1Password side?

Thank you and best regards,

Michael