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Which registry entry? If you mean this: <a href="https://support.microsoft.com/en-us/help/3126599/outlook-prompts-for-password-when-modern-authentication-is-enabled" rel="ugc">https://support.microsoft.com/en-us/help/3126599/outlook-prompts-for-password-when-modern-authentication-is-enabled</a>&nbsp;that is only necessary if you have one mailbox onprem and another in the cloud under the same Outlook profile.
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Which registry entry? If you mean this: https://support.microsoft.com/en-us/help/3126599/outlook-prompts-for-password-when-modern-authentication-is-enabled [https://support.microsoft.com/en-us/help/3126599/outlook-prompts-for-password-when-modern-authentication-is-enabled] that is only necessary if you have one mailbox onprem and another in the cloud under the same Outlook profile.

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EnableADAL key is only required if you want modern auth. &nbsp;You also have to enable OAuth in Set-OrganizationConfig (if it isn't already enabled). &nbsp;Outlook 2016 ships with it turned on by default.
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EnableADAL key is only required if you want modern auth.  You also have to enable OAuth in Set-OrganizationConfig (if it isn't already enabled).  Outlook 2016 ships with it turned on by default.

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Modern Authentication for Office 2013... if we have users running Outlook 2013, and we want to migrate their mailboxes to Office 365, does the registry key still need to be pushed to all PCs prior? I only ask because I think I heard something that caused me to think it wasn't necessary anymore... I may be totally wrong.
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Modern Authentication for Office 2013... if we have users running Outlook 2013, and we want to migrate their mailboxes to Office 365, does the registry key still need to be pushed to all PCs prior? I only ask because I think I heard something that caused me to think it wasn't necessary anymore... I may be totally wrong.

Modern Authentication for Office 2013 Clients

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.

Microsoft Office

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.