Comments
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I have had the same issue before, and again today, with a new Office 365 mailbox. I just spoke to Dropbox for Business support who fixed it: Dropbox Business Support wrote:It seems that this user was added to our Email Suppression list due to a filtered hard bounce-back from their email inbox. I have removed the user from…
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I just had this issue with one user, turns out they had installed the Office apps from the Windows Store rather than their Office 365 software. I removed the apps, installed the desktop software and this fixed it. Thanks for the info.