Latest update for outlook 2016 for mac requires database

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After waiting for minutes, a prompt shows up to enter credentials. After you finish completing the mailbox to Office 365, the user starts Outlook.

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The mailboxes/mailbox databases are currently on Exchange 2010. Outlook prompts for password after migration to Office 365 Add registry key AlwaysUseMSOAuthForAutoDiscover.Enable modern authentication in Microsoft 365 admin center.Solution for Outlook prompts for password after migration to Office 365.Outlook prompts for password after migration to Office 365.