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"AlwaysUseMSOAuthForAutoDiscover"=dword:00000001 Enable modern authentication for Office 2013 clientsĬopy and paste the following text into Notepad: Windows Registry Editor Version 5.00 However, if Groove.EXE is present, then the file version listed in the table is required. * If Groove.EXE isn't part of your Office installation, it doesn't need to be installed for the Azure Active Directory Authentication Library (ADAL) to work. If your file version is not equal to or greater than the file version listed, use the link in the Where to get the update column to update it. MSI-based installationsįor MSI-based installations, you must have the following files installed. File nameĬ:\Program Files\Microsoft Office 15\root\vfs\ProgramFilesCommonx86\Microsoft Shared\OFFICE15\MSO.DLLĬSI.DLL C:\Program Files\Microsoft Office 15\root\office15\csi.dllĬ:\Program Files\Microsoft Office 15\root\office15\GROOVE.exeĬ:\Program Files\Microsoft Office 15\root\office15\OUTLOOK.exeĬ:\Program Files\Microsoft Office 15\root\vfs\ProgramFilesCommonx86\Microsoft Shared\OFFICE15\ADAL.DLL If your file version is not equal to or greater than the file version listed, follow these steps below to update it. For MSI-based installations, an Update Options item does not display.įor Click-to-run installations, you must have the following files installed. To determine whether your Office installation is Click-to-run or MSI-based:įrom the File menu, select Office Account.įor Outlook 2013 Click-to-Run installations, an Update Options item displays. To enable MFA for Office 2013 client apps, you must have the following software installed (the version listed below, or a later version) based on whether you have a Click-to-run based installation or an MSI-based installation. For more information, see Basic authentication in exchange online. This means that if Outlook 2013 is not configured to use modern authentication, it loses the ability to connect. Basic authentication is turned off for Exchange Online mailboxes on Microsoft 365.