I need to copy a few hundred emails from one Exchange mailbox to another. Both are through Office 365 with Godaddy and are added to my default Mac Mail client. Most e-mails are 10-20 KB in size, some are >200 KB. Nothing crazy and well below the limit set in the Exchange Admin Center.
Normally I simply drag and drop across mailboxes and it works, but if an email has attachments (even a few text files as small as 70 kb total) it will fail silently – it will move the email on my Mac locally, and I will see it appear in the destination folder of the mailbox I dropped it to in Mac Mail, but it will not be pushed to the Microsoft serves and I will not see it if I log in to the web version of the mailbox.
And to confirm, as long as the emails do not have attachments, I can drag and drop many at once and they will be uploaded and I will see them on the web.
Is there setting somewhere in either Exchange Admin Center or Mac Mail that I need to enable to allow pushing emails to Office 365 servers?
Tried searching EAC and allowed all attachments (not just recent) in Mac Mail.
