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How to Disable POP and IMAP for All Mailboxes in Office 365

First of all, why disable IMAP or POP? Two reasons: IMAP and POP are less secure mail protocols that are now around 30 years old. In our experience, IMAP and POP is seldom used for legitimate purposes. In almost every breach we’ve discovered, the attackers have used IMAP or POP protocols to download user mailboxes Read More