ユーザーアカウント名は Active Directory で解決できません。ユーザーが実在のユーザーか、アプリケーションの目的で生成された一時的なユーザーオブジェクトかどうか確認してください。LDAP 検索フィルタを変更することで、このエラーを避けられる可能性があります。

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The user account name can not be resolved within the Active Directory. You would need to verify whether the user is a real user or just a temporary user object generated for some application purpose. You might be able to refine the LDAP search filter to avoid this error.

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