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How to fix the Office 365 WINMAIL.DAT attachment issue

Are people receiving emails from your Office 365 users that are blank with an attachment called WINMAIL.DAT? It’s probably time to disable TNEF across your Office 365 organisation. How to fix the Office 365 WINMAIL.DAT attachment issue Connect to Exchange Online via Powershell. Follow our quick guide here to get connected. Run this cmdlet: You’re done! What […]