Unable to use Mailbox Migration for Outlook.com Office 365 and IMAP
Problem reported by Ron Raley - 1/25/2023 at 11:00 AM
Microsoft has recently made it impossible to use the Mailbox Migration on SmarterMail.

There are various settings to reduce security, however, a popup login is required to authenticate, which SmarterMail does not produce. Looks like they require OAuth2.

Thunderbird, eM Client, etc produces this Microsoft popup login and authenticates successfully.

I believe that this has to do with "modern authentication" deadlines outlined here:


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Linda Pagillo Replied
Hey Ron!

Try disabling Security Defaults for your MS account just until you are finshed with the migration. I had this same issue the other day using BitTitan's MigrationWiz to migrate from a SM account to a MS account.
Linda Pagillo
Mail's Best Friend
Email: linda.pagillo@mailsbestfriend.com
Web: www.mailsbestfriend.com
Authorized SmarterTools Reseller
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