When the Microsoft Outlook Web App logon page or the Exchange Admin Center (EAC) logon page is displayed in Spanish in a Microsoft Exchange Server 2013 environment, the label for the username is Nombre de usuario\dominio: instead of Dominio\nombre de usuario:. Therefore, users cannot log on to Outlook Web App or EAC.
The issue occurs because the label is translated incorrectly.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2895678 - Last Review: Nov 25, 2013 - Revision: 1
Microsoft Exchange Server 2013 Standard Edition, Microsoft Exchange Server 2013 Enterprise