Sign-in window doesn't show up, is blank, prematurely disappears, or gets stops working.Unable to sign in: Repeated password prompts, 'Credentials Needed', or 'Needs Password' statuses.Recommendations on resolving common sign-in issuesĪuthentication issues during sign-in or activation typically manifest as one of the following symptoms: Additionally, all future innovations will be implemented on WAM. Furthermore, on Windows devices, some of the security-related features are available exclusively via WAM and are otherwise not possible. Starting with build, Microsoft 365 apps use Web Account Manager (WAM) for sign-in workflows on Windows builds that are later than 15000 (Windows 10, version 1703, build 15063.138).ĪDAL enables sign-in features such as Multi-Factor Authentication (MFA), smart card, and certificate-based authentication for Office client apps across different platforms. Microsoft 365 apps (for example, Office client apps) use Azure Active Directory Authentication Library (ADAL) framework-based Modern Authentication by default. To diagnose and automatically fix several common Office sign-in issues, you can download and run the Microsoft Support and Recovery Assistant.ĭisabling ADAL or WAM authentication as a solution to fix sign-in or activation issues can have adverse effects in your environment and is not recommended.

Windows support and recovery assistant