Troubleshooting Microsoft Exchange Online — Question 33

A company uses Exchange Online. The company enables modern authentication.
Users report that Microsoft Outlook continuously prompts for credentials.
You need to ensure that users can authenticate successfully.
Which registry key should you configure on the client computers?

Answer options

• A. AlwaysUseMSOAuthForAutoDiscover
• B. PreferProvidedEmailInAutoDiscoverAuthPrompts
• C. ExcludeExplicit0365Endpoint
• D. ExcludeHttpAutoDiscoverDomain

Correct answer: A

Explanation

The correct answer is A, as configuring the AlwaysUseMSOAuthForAutoDiscover registry key ensures that Outlook uses modern authentication methods, which helps eliminate the credential prompts. Options B, C, and D do not address the core issue of authentication method preference and are not relevant for resolving the user's credential prompts.