Modern Authentication for Office 2013 Clients

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.
Christian HansUndecided... Asked:
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Adam BrownSr Solutions ArchitectCommented:
Which registry entry? If you mean this: that is only necessary if you have one mailbox onprem and another in the cloud under the same Outlook profile.
Vasil Michev (MVP)Commented:
Yes, it's necessary to have the EnableADAL key configured on any machines running Office 2013. Only 2016 clients have it enabled by default.

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Aaron GuilmetteTechnology Solutions ProfessionalCommented:
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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